Win Update KB5070311 Windows 11 Cumulative Update Preview build 26100.7309 (24H2) and 26200.7309 (25H2) - Dec. 1


UPDATE 12/09:


 Microsoft Support:

December 1, 2025 - KB5070311 (OS Builds 26200.7309 and 26100.7309) Preview​

This non-security update for Windows 11, version 25H2 and 24H2 (KB5070311), improves functionality, performance, and reliability. To learn more about differences between security updates, optional non-security preview updates, Out-of-band (OOB) updates, and continuous innovation, see Windows monthly updates explained. For information on Windows update terminology, see the different types of Windows software updates.

To view the latest updates about this release, visit the Windows release health dashboard or the update history page for Windows 11, version 24H2 and version 25H2.

Announcements and messages

This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices.

Simplified Windows update titles​

A new, standardized title format makes Windows updates easier to read and understand. It improves clarity by removing unnecessary technical elements like platform architecture. Key identifiers such as date prefixes, the KB number, and build or version are retained to help you quickly recognize each update.

For more details, see Simplified Windows Update titles or its accompanying blog post.

December servicing update schedule​

Due to reduced operations during the Western holidays in December and New Year's Day, Microsoft will not release a non-security preview update in December 2025. The monthly security update will still be available as scheduled. Regular monthly servicing, including both security updates and non-security preview updates, will resume in January 2026.

Windows Secure Boot certificate expiration​

Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and preparation steps, see Windows Secure Boot certificate expiration and CA updates.


Change log​

Change dateChange description
January 20, 2026Update: These features, originally documented for the December 2025 non‑security update (KB5070311), have been removed from documentation. They are planned for a future release.

[Widgets] You can choose a default dashboard in Widget Board settings. When live weather is showing, the Widget Board opens the first dashboard in your navigation bar instead of the most recently used one, making the experience consistent. To set your default dashboard, open the full-page Widgets Settings by selecting Settings in the navigation bar, then move your preferred dashboard to the top.

[Widgets] Dashboard icons in the Widget navigation bar now show numbers that correspond to the number of alerts from that dashboard. Navigation bar badges clear automatically when you leave a dashboard, making it easy to track what’s new.
December 18, 2025Update: This feature, originally documented for the December 2025 non‑security update (KB5070311), has been removed from documentation. It’s planned for a future release.

[Windows Search] New! You can now find your AI-categorized photos from the Microsoft Photos app using Windows Search with semantic search.
December 12, 2025Update: This feature is included in the December 2025 non-security update (KB5070311).

[File Explorer] New! The Recommended section in File Explorer now makes it easier to access files you frequently use or recently downloaded. To view this section on the homepage, turn on the Show Recommended section setting in File Explorer > Options. This feature is now available to all users, including those signed in with personal Microsoft accounts.
December 12, 2025Update: This feature introduced in the December 2025 non-security update (KB5070311) is no longer available in this release.

[Taskbar & System Tray] New! Animations for app groups on the taskbar have been updated. When you hover over app groups on the taskbar, you can see the preview transition as you slide between apps.
December 9, 2025Update: This feature is included in the December 2025 non-security update (KB5070311).

[Keyboard] New! The AltGr layer is now enabled for the Arabic 101 keyboard layout. The left Alt key continues to function as before, while the right Alt key acts as a modifier to access additional symbols. The first new symbol mapped to AltGr on the Arabic 101 layout is the Saudi Riyal currency symbol (AltGr+S). The Saudi Riyal currency symbol is also available on the touch keyboard’s symbols page and the expressive input panels currency tab. Users who switch languages with Alt+Shift can continue to use the left Alt+Shift or the general shortcut Windows logo key+Spacebar. Arabic 102 and Arabic 102 AZERTY layouts are updated similarly.

Highlights

This update is available through two release phases: gradual rollout and normal rollout. A gradual rollout delivers an update in phases, so features reach devices over time instead of all at once, meaning availability varies by device. A normal rollout is the broad release to all eligible devices at the same time, usually when it reaches general availability (GA).

Gradual rollout

The following summary outlines features from Copilot experiences and AI-powered Windows 11 PC experiences, along with improvements and fixes. The bold text within the brackets indicates the item or area of the change.

For more info on the different AI experiences, see aka.ms/copilotpluspcs.

Copilot+ PCs experiences​

This section highlights updates and improvements unique to Copilot+ PCs, focusing on AI-powered features, performance enhancements, and user experience optimizations.
  • [Agent in Settings]
    • New! The search results menu displays more available results, making it easier to quickly find and modify your settings. A scroll bar lets you view all search results.

    • New! Recommended settings now makes changes faster by showing an inline agent option for recently modified settings.

    • New! A dialog now appears when settings can’t be adjusted further. It explains why and provides an option to modify the settings as needed.
  • [Click to Do]
    • New! 1 The Click to Do context menu now has a streamlined design that makes it easier to access frequently used actions such as Copy, Save, Share, and Open. You can quickly find what you need.
    • New! 1 Whenever a large image or table appears on your screen, the context menu automatically opens so you can quickly access actions and view results.

  • [Camera] New! You can use Windows Studio Effects, which provides AI-powered camera enhancements, on an additional camera such as a USB webcam or your laptop’s built-in rear camera. To get started, go to Settings > Bluetooth & devices > Cameras, and select your preferred camera from the connected cameras list. Then, open Advanced camera options and turn on Use Windows Studio Effects. After you turn it on, you can adjust Studio Effects from the camera settings page or the quick settings menu in the taskbar.

  • [File Explorer]
    • New! The File Explorer Search Box placeholder text has been updated to highlight the enhanced Windows Search experiences.
    • New! File Explorer Home on-hover actions for faster file management (previously released in KB5067036) is now available for enterprise customers.
  • [Windows Search] New! You can now find your AI-categorized photos from the Microsoft Photos app using Windows Search with semantic search.

1 Functionality will vary by device and market.

Windows 11 PC experiences​

This section highlights new features and enhancements for Windows 11 PCs, including AI-powered capabilities, continuous innovation, and performance improvements.

Improvements and fixes
  • [Advanced Settings] New! You can now turn on Virtual Workspaces in Advanced Settings. Virtual Workspaces allow you to enable or disable virtual environments such as Hyper-V and Windows Sandbox. To access Virtual Workspaces, go to Settings > Systems > Advanced.

  • [Desktop Spotlight] New! When Windows Spotlight is set as your desktop background (Settings > Personalization > Background), the context menu now includes two options: Learn more about this background and Next desktop background.

  • [File Explorer]
    • New! File Explorer now offers a more consistent dark mode experience. Key actions such as copy, move, and delete dialogs have been updated in both default and expanded views. Progress bars and chart views now align with the dark theme to improve readability. Confirmation dialogs for actions like skip, override, and file selection, along with multiple error dialogs, have also been refreshed for a cohesive look.
    • New! The simplified File Explorer context menu for easier navigation. Common actions like Share, Copy, and Move now appear in a single organized menu. This change removes clutter and makes commands easier to find, whether you use a mouse, keyboard, or assistive technology. This change will initially be available to a small group of devices as we evaluate the best approach.
    • New! The Recommended section in File Explorer now makes it easier to access files you frequently use or recently downloaded. To view this section on the homepage, turn on the Show Recommended section setting in File Explorer > Options. This feature is now available to all users, including those signed in with personal Microsoft accounts.
    • Fixed: File Explorer might unexpectedly not show thumbnails for video files containing certain EXIF metadata.
    • Fixed: A toolbar might sometimes appear unexpectedly in File Explorer.
    • Fixed: When you right-click a file, the app icon next to the Open option might appear generic instead of showing the default app for that file type.
  • [Gaming] New! The full screen experience (FSE) is now available on more Windows 11 handheld devices after its initial launch on ASUS ROG Ally and ROG Ally X. FSE gives you a console-style interface with the Xbox app, making handheld gaming clean and distraction-free. It improves performance by minimizing background tasks, so gameplay stays smooth and responsive. To turn it on, go to Settings > Gaming > Full screen experience, and set Xbox as your home app. You can open FSE from Task View or Game Bar, or configure your handheld to enter full screen experience on startup.

  • [Input] New! Pens that support haptic feedback—small vibrations that simulate touch—now provide tactile responses when you interact with the Windows interface. For example, you might feel vibrations when hovering over the close button or when snapping and resizing windows.
  • [Keyboard]
    • New! Keyboard backlight performance has improved on supported HID-compliant keyboards. Compatible keyboards display keys clearly in low-light environments, and the backlight adjusts to help conserve power.
    • New! The AltGr layer is now enabled for the Arabic 101 keyboard layout. The left Alt key continues to function as before, while the right Alt key acts as a modifier to access additional symbols. The first new symbol mapped to AltGr on the Arabic 101 layout is the Saudi Riyal currency symbol (AltGr+S). The Saudi Riyal currency symbol is also available on the touch keyboard’s symbols page and the expressive input panels currency tab. Users who switch languages with Alt+Shift can continue to use the left Alt+Shift or the general shortcut Windows logo key+Spacebar. Arabic 102 and Arabic 102 AZERTY layouts are updated similarly.
  • [Mobile Device Settings] New! You can add and manage your mobile devices in Settings under Bluetooth & Devices › Mobile Devices. On this page you can manage features such as using your device as a connected camera or accessing your device’s files in File Explorer.

  • [OneDrive] New! The new OneDrive icon now appears in Settings > Accounts > Homepage.
  • [Recovery] New! Quick Machine Recovery (QMR) now runs a one-time scan on PCs with settings quick machine recovery and automatically check for solutions are both turned on. If a fix isn’t available immediately, QMR directs you to the best recovery options to get your PC running again

  • [Settings]
    • New! Keyboard settings for "character repeat delay and rate", and "cursor blink rate", have moved from Control Panel to Settings. You can now find "character repeat delay and rate" under Settings > Accessibility > Keyboard, and "cursor blink rate" under Settings > Accessibility > Text cursor.

    • New! About in Settings now has an updated layout that organizes device details and related options in one place. You can quickly access features such as Storage settings for faster navigation.
    • Fixed: Settings might become unresponsive when attempting to navigate to the Network & Internet section.
    • Fixed: The search bar in Settings might become overlapped with the minimum and maximum buttons in the title bar.
  • [Taskbar & System Tray]
    • New! You can now share an open app window with Copilot directly from the taskbar. When you hover over an open app, you’ll see the option to share its window with Copilot—similar to sharing in Microsoft Teams. Hover over the app icon, select Share with Copilot to start a conversation. Copilot Vision will analyze the content you shared and provide insights based on what’s displayed in that app.

    • Fixed: The Automatically hide the taskbar setting might unexpectedly turn off, after seeing a message saying a toolbar is already hidden on this side of your screen.
    • Fixed: Voice access doesn't work correctly when attempting to interact with the taskbar (calling out a number might not invoke that item).
    • Fixed: The taskbar icons might automatically scale to be smaller, although there is enough room left without scaling changes.
  • [Widgets]
    • New! You can choose a default dashboard in Widget Board settings. When live weather is showing, the Widget Board opens the first dashboard in your navigation bar instead of the most recently used one, making the experience consistent. To set your default dashboard, open the full-page Widgets Settings by selecting Settings in the navigation bar, then move your preferred dashboard to the top.

    • New! Dashboard icons in the Widget navigation bar now show numbers that correspond to the number of alerts from that dashboard. Navigation bar badges clear automatically when you leave a dashboard, making it easy to track what’s new.

  • [Windows Share]
    • New! 2 Drag tray now supports multi-file sharing, shows more relevant apps, and makes it easy to move files to a chosen folder.
    • New! 2 You can now turn drag tray on or off from Settings > System > Nearby sharing.

    • New! 3 You can share OneDrive files through other apps. The options appear under Share using when you select the Copy link. You must be signed into your Microsoft account.

  • [Display and Graphics]
    • Improved: Performance has been improved when apps query monitors for their full list of supported modes. When this happens it could previously lead to a momentary stutter on very high-resolution monitors. This work should help prevent and reduce stuttering in these scenarios.
    • Fixed: All-in-one PCs might experience issues with their brightness slider, where it unexpectedly reverts to the original brightness when interacting with it.
    • Fixed: Recently certain games might display the message Unsupported graphics card detected, although a supported graphics card is used.
  • [Game Pass] References to Game Pass in Settings are now modified to reflect updated branding and benefits.
  • [Start menu] Improved: For users with the new Start menu, the Windows Search panel now matches the new Start menu in size. This update aims to create a smoother transition when searching.
  • [Lock and Sign-in Screens]
    • Fixed: It might be very slow the first time when signing into a new account.
    • Fixed: When your lock screen is set to slide show, there might be a memory leak. Memory leaks can lead to performance or reliability issues over time.
  • [Smart cards] Fixed: You might unexpectedly see STATUS_NOT_SUPPORTED (0xc00000bb) during sign on when using ECC Smart Card Logon Credential.
  • [Prism] Windows on Arm devices now have emulation support for applications that use AVX and AVX2, as well as related extensions such as BMI, FMA, and F16C.
2 This feature is gradually rolling out, and availability will vary by device and market. Drag tray might not be available to all devices yet. See KB5058499 for more information about the drag tray feature in Windows Share.

3 Feature availability depends on your device and market. This feature isn’t available in the European Economic Area.

Normal rollout

This update is available through two release phases: gradual rollout and normal rollout. A gradual rollout delivers an update in phases, so features reach devices over time instead of all at once, meaning availability varies by device. A normal rollout is the broad release to all eligible devices at the same time, usually when it reaches general availability (GA).

This non-security update includes quality improvements. The following summary outlines key issues addressed by the KB update after you install it. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.
  • [Notifications] Fixed: After the latest updates, explorer.exe might stop responding (leading to the taskbar becoming unresponsive) after certain notifications.
  • [Search indexer] Fixed: This update addresses an issue where File Explorer might not search certain SMB (Server Message Block) shares after the latest updates.
  • [Security] Fixed: This update addresses an issue that affects Local Security Authority Subsystem Service (LSASS). LSASS could become unstable due to an access violation.
  • [Settings] Fixed: This update addresses an issue when Settings might unexpectedly close when navigating to Settings > Privacy & Security > Microphone, Camera, or Location pages after the latest updates.
If you installed earlier updates, your device downloads and installs only the new updates contained in this package.

AI Components

This release updates the following AI components:

AI ComponentVersion
Image Search1.2511.1196.0
Content Extraction1.2511.1196.0
Semantic Analysis1.2511.1196.0
Settings Model1.2511.1196.0

Windows 11 servicing stack update (KB5071142)- 26100.7295

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. To learn more about SSUs, see Simplifying on-premises deployment of servicing stack updates.

Known issues in this update

1 File Explorer might flash with a white screen in dark mode

Symptoms

After installing KB5070311, you might experience issues when opening File Explorer in dark mode. The window might briefly display a blank white screen before loading files and folders. This can also occur when you:
  • Navigate to or from Home or Gallery (including launching to Home)
  • Create a new tab
  • Turn the Details pane on or off
  • Select More details while copying files
Workaround

This issue is addressed in KB5072033.

2 Password icon might be missing or invisible in the lock screen sign-in options

Symptoms

After installing the August 2025 non-security preview update (KB5064081) or later updates, you might notice that the password icon is not visible in the sign-in options on the lock screen. If you hover over the space where the icon should appear, you’ll see that the password button is still available. Select this placeholder to open the password text box and enter your password. After entering your password, you can sign in normally.

Individuals using Windows Home or Pro editions on personal devices are very unlikely to experience this issue. This issue primarily affects enterprise or managed IT environments.

Workaround

This issue is mitigated using Known Issue Rollback (KIR).

For enterprise-managed devices managed by IT departments that have installed the affected update and encountered this issue, IT administrators can resolve it by installing and configuring the Group policy listed below. The special Group Policy can be found in Computer Configuration > Administrative Templates > <Group Policy name listed below>.

For information on deploying and configuring these special Group Policy, please see How to use Group Policy to deploy a Known Issue Rollback.

Group Policy downloads with Group Policy name:
Important: You will need to install and configure the Group Policy for your version of Windows to resolve this issue. You will also need to restart your device(s) to apply the group policy setting. Note that the Group Policy will temporarily disable the change causing this issue.

We are working on a resolution in a future Windows update and will provide more information when it is available.

3 Mirror networking on Windows Subsystem for Linux might fail

Symptoms

After installing the October 2025 Windows non-security update (KB5067036), released on October 28, 2025, or a later update, mirrored networking mode in Windows Subsystem for Linux (WSL) might cause issues with some third-party VPNs. When this issue occurs, you might see a “No route to host” error, even though the Windows host can still access the same destinations. As a result, you might be unable to access corporate resources over VPN and experience failures with VPN-dependent services.

This issue happens because the VPN application's virtual interface doesn’t respond to ARP (Address Resolution Protocol) requests. Reports indicate that Cisco Secure Client (formerly Cisco AnyConnect) and OpenVPN are affected.

Note: Home users of Windows Home or Pro editions are unlikely to experience this issue. It primarily affects connectivity to enterprise resources over VPN, including DirectAccess.

Workaround

This issue is addressed in KB5074109.

4 RemoteApp sessions might fail to start on Azure Virtual Desktop

Symptoms

Note:
Individuals using Windows Home or Pro editions on personal devices are very unlikely to experience this issue as Azure Virtual Desktop (AVD) is more commonly used in enterprise environments.

After installing the November 2025 Windows non-security update (KB5070311) or later updates, you might experience RemoteApp connection failures in Azure Virtual Desktop (AVD) environments. Full desktop sessions aren’t affected.

Workaround

This issue is addressed in KB5074109.

How to get this update

Before you install this update

Microsoft combines the latest servicing stack update (SSU) for your operating system with the latest cumulative update (LCU). For general information about SSUs, see Servicing stack updates and Servicing Stack Updates (SSU): Frequently Asked Questions.

Install this update

To install this update, use one of the following Windows and Microsoft release channels.

AvailableNext Step
Included
Open Start > Settings Update & Security > Windows Update. In the Optional updates available area, you will find the link to download and install available updates.
Check for optional updates
Yes 4Before you install this update
To get the standalone package(s) for this update, go to the Microsoft Update Catalog website. This KB contains one or more MSU files that require installation in a specific order.

Install this update

Method 1: Install all MSU files together

Download all MSU files for KB5070311 from Microsoft Update Catalog and place them in the same folder (for example, C:/Packages). Use Deployment Image Servicing and Management (DISM.exe) to install the target update. DISM will use the folder specified in PackagePath to discover and install one or more prerequisite MSU files as needed.

Updating Windows PC
To apply this update to a running Windows PC, run the following command from an elevated Command Prompt:
DISM /Online /Add-Package /PackagePath:c:\packages\Windows11.0-KB5070311-x64.msu

Or, run the following command from an elevated Windows PowerShell prompt:
Add-WindowsPackage -Online -PackagePath "c:\packages\Windows11.0-KB5070311-x64.msu"

Or use Windows Update Standalone Installer to install the target update.

Updating Windows Installation media
To apply this update to Windows Installation media, see Update Windows installation media with Dynamic Update.

Note: When downloading other Dynamic Update packages, ensure they match the same month as this KB. If the SafeOS Dynamic Update or Setup Dynamic Update is not available for the same month as this KB, use the most recently published version of each.

To add this update to a mounted image, run the following command from an elevated Command Prompt:
DISM /Image:mountdir /Add-Package /PackagePath:Windows11.0-KB5070311-x64.msu

Or, run the following command from an elevated Windows PowerShell prompt:
Add-WindowsPackage -Path "c:\offline" -PackagePath "Windows11.0-KB5070311-x64.msu" -PreventPending

Method 2: Install each MSU file individually, in order
Download and install each MSU file individually either using DISM or Windows Update Standalone Installer in the following order:
  1. windows11.0-kb5043080-x64_953449672073f8fb99badb4cc6d5d7849b9c83e8.msu
  2. windows11.0-kb5070311-x64_199ed7806a74fe78e3b0ef4f2073760000f71972.msu

4 This latest cumulative update includes updates for AI components. Even though the AI component updates are included in the update, the AI components are only applicable to Windows Copilot+ PCs and will not install on Windows PC or Windows Server.

If you want to remove the LCU

To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.

Running Windows Update Standalone Installer (wusa.exe) with the /uninstall switch on the combined package will not work because the combined package contains the SSU. You cannot remove the SSU from the system after installation.

File information

For a list of the files provided in this update, download the file information for cumulative update 5070311.

For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5071142) - version 26100.7295.



 Source:



Check Windows Updates


UUP Dump:

64-bit ISO download:

ARM64 ISO download:

 
Last edited:

My Computers

System One System Two

  • OS
    Win 11 Pro 25H2 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self Built
    CPU
    Intel® Core™ i7-14700K
    Motherboard
    ASUS TUF Z690-PLUS WIFI BIOS 4505 11/29/25
    Memory
    G.SKILL Ripjaws S5 Series 64GB (2 x 32GB) DDR5
    Graphics Card(s)
    ASUS GeForce RTX 4070 Super 12GB
    Sound Card
    Sound Blaster AE-5 Plus
    Monitor(s) Displays
    ASUS TUF Gaming 27" 2K HDR Gaming
    Screen Resolution
    2560 x 1440
    Hard Drives
    Samsung 990 Pro 1TB NVMe (Win 11 25H2)
    SK hynix P41 500GB NVMe 25H2 DEV/Games
    SK hynix P41 2TB NVMe (x3)
    Crucial P3 Plus 4TB
    PSU
    Corsair RM850x Shift
    Case
    Antec Dark Phantom DP502 FLUX
    Cooling
    Corsair Nautilus 360 RS AIO
    Keyboard
    Logitech MK 320
    Mouse
    Razer Basilisk V3
    Internet Speed
    350Mbs
    Browser
    Firefox
    Antivirus
    Winows Security
    Other Info
    MR 8.1 Home

    System 3 Specs
    Win 11 Pro 25H2 26200.8524
    ASUS PRIME Z370-P II BIOS 3004 7/12/21
    Intel Core i7-8700 CPU @ 3.20GHz
    32GB DDR4 RAM (4x8)
    iGPU Intel UHD Graphics 630
  • Operating System
    Win 11 Pro 25H2 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self Built
    CPU
    Intel Core i7-11700F
    Motherboard
    Asus TUF Gaming Z590 Plus WiFi (BIOS 2803)
    Memory
    64 GB DDR4
    Graphics card(s)
    MSI GeForce RTX 3060 Ventus 2X 12GB
    Sound Card
    SoundBlaster Audigy Fx V2
    Monitor(s) Displays
    Samsung F27T350
    Screen Resolution
    1920x1080
    Hard Drives
    Samsung 980 Pro 1TB
    Samsung 970 EVO Plus 2TB
    Samsung 870 EVO 500GB SSD
    PSU
    Corsair HX750
    Case
    Cougar MX330-G Window
    Cooling
    Thermalright Frozen Edge 240 Black AIO
    Internet Speed
    350Mbps
    Browser
    Firefox
    Antivirus
    Windows Security
Neither have I, but I'm all updated. Are you?
Updated on some machines, but not all.

On this machine this CA 2023 is not listed in the UEFI KEK Certs.
1764718152792.webp


1764718090735.webp
Still showing "InProgress" in the registry and never switched to "Updated" 😵‍💫🤷‍♂️

1764718346584.webp


This other one looks OK.
1764718618079.webp

1764718711400.webp
 

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
I wonder if my not seeing it has anything to do with my using an OLED screen.

I have a OLED screen and I can see the flashbang when opening a new tab with "My PC"

Its pretty fast but its noticable my OLED is also on 240hz.

Also if I open a new tab then select a drive navigate there and then use the back button to go back all the way to My PC, the white doesnt show probably some cashing that happened
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    DIY
    CPU
    13900KS
    Motherboard
    Asus Z790 Apex
    Memory
    32GB DDR5
    Graphics Card(s)
    Nvidia 4090
    Sound Card
    Onbourd
    Monitor(s) Displays
    LG 27' IPS 144hz
    Screen Resolution
    4K
    Hard Drives
    Several
    PSU
    HX1000

My Computer

System One

  • OS
    Windows 11
I have a OLED screen and I can see the flashbang when opening a new tab with "My PC"

Its pretty fast but its noticable my OLED is also on 240hz.

Also if I open a new tab then select a drive navigate there and then use the back button to go back all the way to My PC, the white doesnt show probably some cashing that happened
I wonder if my not seeing it has anything to do with my using an OLED screen.
Interesting, I have a 18-inch IPS WQXGA (2560 x 1600) display with a up to a 300 Hz refresh rate usually set to 144 Hz and can't notice any flashing white screen. Same for my Surface Laptop 7 which is an LCD screen with an adaptive refresh rate up to 120Hz. I don't think everyone's PC are affected by this bug.
 

My Computers

System One System Two

  • OS
    Windows 11 25H2
    Computer type
    Laptop
    Manufacturer/Model
    Alienware 18 Area-51
    CPU
    Intel Core Ultra 9 275HX (24-Core)
    Motherboard
    Alienware
    Memory
    64GB DDR5 6400MT/s
    Graphics Card(s)
    NVIDIA GeForce RTX 5080 and Intel UHD Graphics
    Sound Card
    Onboard, Realtek high-performance Audio chips (ALC3329 & ALC1708))
    Monitor(s) Displays
    300HZ 18-inch QHD 500 nit Comfort View+
    Screen Resolution
    2560 x 1600
    Hard Drives
    2TB NVMe M.2 PCIe Gen 5 SSD
    Case
    Magnesium Alloy
    Cooling
    Advanced Cryo-Tech Quad-Fan Cooling system & large vapor chamber
    Keyboard
    Cherry MX ultra low profile mechanical keyboard with per key AlienFX RGB lighting
    Mouse
    Logitech MX Master 4
    Browser
    Vivaldi (main), Firefox, Chrome, Edge
    Antivirus
    MS Defender and Malwarebytes Free
  • Operating System
    Windows 11 25H2
    Computer type
    Laptop
    Manufacturer/Model
    Microsoft Surface Laptop 7
    CPU
    Qualcomm Snapdragon X Elite (12 Core) ARM based CPU
    Motherboard
    Microsoft Corp.
    Memory
    16GB LPDDR5
    Graphics card(s)
    Qualcomm Adreno X1-85
    Sound Card
    Omnisonic speakers with Dolby Atmos spatial sound
    Monitor(s) Displays
    120 Hz 13.8-inch 600 nit PixelSense Flow touchscreen
    Screen Resolution
    2304x1536
    Hard Drives
    1TB NVMe Gen 4 SSD
    Case
    Anodized Aluminum
    Cooling
    Traditional active cooling fan system
    Keyboard
    Mechanical QWERTY, backlit when in use
    Mouse
    Logitech MX Master 4 and Surface Arc Mouse
    Browser
    Vivaldi (main), Firefox, Chrome, Edge
    Antivirus
    MS Defender and Malwarebytes Free
The flashing has nothing to do with displays.
It's your CPU, the amount of RAM dedicated to the process and the necessary elements to load the final UI.
When I load the Explorer SDK, my CPU spikes at 38.5%..., when I load Win32 Explorer, it spikes at 7.3%.

When I restart the Explorer SDK, 6 Process ID's get terminated...

0008231.webp

when I restart Explorer 32, 1 ID gets terminated...

0008228.webp
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    ASUS ROG Strix
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    ASUS VivoBook
The KEK CA 2023 may not show up for a couple of reasons, the OEM hasn't released it to MS, or the device is no longer supported.
Does that mean that I have to throw away that PC when CA 2011 Expires next June?
 

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
Up to date here
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    ASUS
    CPU
    I7 12700 K
    Motherboard
    ASUS Z790-F
    Memory
    32 GB DDR 5 5600MHZ
    Graphics Card(s)
    ZOTAC 1060 8 GB
    Monitor(s) Displays
    Alienware G-SYNC
    Screen Resolution
    1920x1080
    Hard Drives
    XPG 1 TB NVME
    PSU
    ASUS 850
    Case
    CORSAIR 570x
    Cooling
    CORSAIR 360 MM
    Keyboard
    Logitech 815
    Mouse
    LOGITEH GPRO
    Internet Speed
    40/5
    Browser
    Edge
Also if I open a new tab then select a drive navigate there and then use the back button to go back all the way to My PC, the white doesnt show probably some cashing that happened
It shows the white flash when adding a new tab, when I do what you suggest and close the added tabs, when I add them again there is no white flash, just a brief black flash of an empty window before it populates it.
I believe that was the normal expected behavior before they added this white flash problem. 🤷‍♂️

I just noticed another detail, when adding a tab, the white flash only happens if the 1st open tab is on Home or Gallery.
If I select a different folder (in this case just C:\) then there is no white flash when adding a new tab. 😉😂🤷‍♂️
Also, if I open File explorer directly on a different folder instead of the "Home" default, then there is no white flash. 😎🤷‍♂️

1764727098002.webp
 
Last edited:

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
Does that mean that I have to throw away that PC when CA 2011 Expires next June?
No, worse case, you might have to turn off secure boot. Maybe one day in the future MS might enforce secure boot, who knows, by then you'll have likely found another newer gently used device, assuming the issue was your previous device was unsupported.
 

My Computer

System One

  • OS
    Windows 11

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Asus/Custom Build
    CPU
    Intel® Xeon® X5690 3.47GHz Six-Core
    Motherboard
    Asus P6T Deluxe v2
    Memory
    G.Skill PC3-12800 1600MHz 24GB
    Graphics Card(s)
    NVIDIA GeForce GTX 1050
    Sound Card
    SoundMAX ADI AD2000B HD Audio
    Monitor(s) Displays
    Acer T232HL Touch Screen
    Screen Resolution
    1920 x 1080 @ 60Hz
    Hard Drives
    6 Crucial MX500 SSD 1TB each.
    PSU
    Thermaltake Toughpower Gold 850W
    Case
    Thermaltake Armor VA8000SWA
    Cooling
    Thermaltake Air Cooling System
    Keyboard
    Illuminated Multimedia LED Keyboard
    Mouse
    M16 Dual Mode Illuminated Mouse - Bluetooth / 2.4 GHz Mode
    Internet Speed
    800 Mbps
    Browser
    Edge / Opera / Vivaldi / Chrome / Firefox / Brave
    Antivirus
    Windows Defender Security
No, worse case, you might have to turn off secure boot. Maybe one day in the future MS might enforce secure boot, who knows, by then you'll have likely found another newer gently used device, assuming the issue was your previous device was unsupported.
One of the devices with the problem is a DELL XPS 8930 with Latest BIOS 1.1.31 dated 2023-11-21.
1764728597589.webp
 

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
Thanks for that! This is the answer I was looking for... Now it's clear.

:thumbsup:
First time on Nov 28 it was just for R.P. insider, then on Dec 1 it is a Preview on non-insider public Build. 🤷‍♂️
 
Last edited:

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
@fg2001gf11F

Here is my default for File Explorer. I never see a white flash on System One.

1764732908031.webp


On System Two the white flash is irritatingly noticeable.
 
Last edited:

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell XPS 16 DA16260
    CPU
    Intel Series 3 Core Ultra X9 388H
    Memory
    64GB LPDDR5x 9600 MT/s
    Graphics Card(s)
    Intel Arc graphics B390 Panther Lake
    Monitor(s) Displays
    16" 3.2K Tandem OLED Infinity Edge
    Screen Resolution
    3200 x 2000 16:10 236 PPI
    Hard Drives
    1 Terabyte M.2 PCIe NVMe SSD
    Case
    Black Anodized Aluminum
    Cooling
    Vapor Chamber Cooling
    Mouse
    None
    Internet Speed
    942 Mbps Netgear Mesh + 2 Satellites
    Browser
    Microsoft Edge (Chromium)
    Antivirus
    Windows Security (Defender)
    Other Info
    NPU delivering 67 TOPS
    Microsoft 365 subscription
    Microsoft OneDrive 1TB Cloud
    Microsoft Visual Studio
    Microsoft Visual Studio Code
    Microsoft Sysinternals Suite
    Microsoft BitLocker
    Microsoft Copilot
    Dell Support Assist
    Dell Command | Update
    Macrium Reflect X subscription
    1Password Password Manager
    Amazon Kindle for PC
    Lightroom/Photoshop subscription
    Interactive Brokers Trader Workstation
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Microsoft Surface Laptop 7
    CPU
    Snapdragon® X Elite (12 Core) with Hexagon NPU delivering 45 TOPS
    Memory
    32GB LPDDR5x 8448 MT/s
    Graphics card(s)
    Integrated Adreno GPU
    Sound Card
    Omnisonic speakers with Dolby Atmos spatial sound
    Monitor(s) Displays
    13.8″ PixelSense Flow touchscreen 120 Hz 600 NIT
    Screen Resolution
    2304 × 1536 (201 PPI), 3:2 aspect ratio
    Hard Drives
    1 TB PCIe NVMe Gen 4 SSD
    Case
    Black Anodized Aluminum
    Cooling
    Vapor Chamber Cooling
    Mouse
    None
    Internet Speed
    942 Mbps Netgear Mesh + 2 Satellites
    Browser
    Microsoft Edge (Chromium)
    Antivirus
    Windows Security (Defender)
    Other Info
    Microsoft 365 subscription (Office)
    Microsoft OneDrive 1TB Cloud
    Microsoft Visual Studio 2026
    Microsoft Visual Studio Code
    Interactive Brokers Trader Workstation
    Lightroom/Photoshop subscription
    1Password Password Manager
    Microsoft Sysinternals
    Amazon Kindle for PC
    Microsoft BitLocker
    Microsoft Copilot

My Computer

System One

  • OS
    Windows 11 Pro 25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell XPS 8930
    CPU
    Intel I9-9900K
    Memory
    64GB
    Graphics Card(s)
    NVIDIA RTX 2060
    Sound Card
    NVIDIA High Definition Audio
    Monitor(s) Displays
    4k Samsung
    Screen Resolution
    3840 x 2160
    Hard Drives
    512GB NVMe, ADATA SU 800, 2TB HDD
What is the default folder setting on your System Two? Same as System One?
Yes. The default is my OneDrive folder and both computers always see exactly the same files in real-time.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Dell XPS 16 DA16260
    CPU
    Intel Series 3 Core Ultra X9 388H
    Memory
    64GB LPDDR5x 9600 MT/s
    Graphics Card(s)
    Intel Arc graphics B390 Panther Lake
    Monitor(s) Displays
    16" 3.2K Tandem OLED Infinity Edge
    Screen Resolution
    3200 x 2000 16:10 236 PPI
    Hard Drives
    1 Terabyte M.2 PCIe NVMe SSD
    Case
    Black Anodized Aluminum
    Cooling
    Vapor Chamber Cooling
    Mouse
    None
    Internet Speed
    942 Mbps Netgear Mesh + 2 Satellites
    Browser
    Microsoft Edge (Chromium)
    Antivirus
    Windows Security (Defender)
    Other Info
    NPU delivering 67 TOPS
    Microsoft 365 subscription
    Microsoft OneDrive 1TB Cloud
    Microsoft Visual Studio
    Microsoft Visual Studio Code
    Microsoft Sysinternals Suite
    Microsoft BitLocker
    Microsoft Copilot
    Dell Support Assist
    Dell Command | Update
    Macrium Reflect X subscription
    1Password Password Manager
    Amazon Kindle for PC
    Lightroom/Photoshop subscription
    Interactive Brokers Trader Workstation
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Microsoft Surface Laptop 7
    CPU
    Snapdragon® X Elite (12 Core) with Hexagon NPU delivering 45 TOPS
    Memory
    32GB LPDDR5x 8448 MT/s
    Graphics card(s)
    Integrated Adreno GPU
    Sound Card
    Omnisonic speakers with Dolby Atmos spatial sound
    Monitor(s) Displays
    13.8″ PixelSense Flow touchscreen 120 Hz 600 NIT
    Screen Resolution
    2304 × 1536 (201 PPI), 3:2 aspect ratio
    Hard Drives
    1 TB PCIe NVMe Gen 4 SSD
    Case
    Black Anodized Aluminum
    Cooling
    Vapor Chamber Cooling
    Mouse
    None
    Internet Speed
    942 Mbps Netgear Mesh + 2 Satellites
    Browser
    Microsoft Edge (Chromium)
    Antivirus
    Windows Security (Defender)
    Other Info
    Microsoft 365 subscription (Office)
    Microsoft OneDrive 1TB Cloud
    Microsoft Visual Studio 2026
    Microsoft Visual Studio Code
    Interactive Brokers Trader Workstation
    Lightroom/Photoshop subscription
    1Password Password Manager
    Microsoft Sysinternals
    Amazon Kindle for PC
    Microsoft BitLocker
    Microsoft Copilot
First time on Nov 28 it was just for R.P. insider, then on Dec 1 it is a Preview on non-insider public Build. 🤷‍♂️
Yes, I gotta now...

I was confused why it wasn't showing up on windows update.

;-)
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
    Manufacturer/Model
    Asus/Custom Build
    CPU
    Intel® Xeon® X5690 3.47GHz Six-Core
    Motherboard
    Asus P6T Deluxe v2
    Memory
    G.Skill PC3-12800 1600MHz 24GB
    Graphics Card(s)
    NVIDIA GeForce GTX 1050
    Sound Card
    SoundMAX ADI AD2000B HD Audio
    Monitor(s) Displays
    Acer T232HL Touch Screen
    Screen Resolution
    1920 x 1080 @ 60Hz
    Hard Drives
    6 Crucial MX500 SSD 1TB each.
    PSU
    Thermaltake Toughpower Gold 850W
    Case
    Thermaltake Armor VA8000SWA
    Cooling
    Thermaltake Air Cooling System
    Keyboard
    Illuminated Multimedia LED Keyboard
    Mouse
    M16 Dual Mode Illuminated Mouse - Bluetooth / 2.4 GHz Mode
    Internet Speed
    800 Mbps
    Browser
    Edge / Opera / Vivaldi / Chrome / Firefox / Brave
    Antivirus
    Windows Defender Security
Does that mean that I have to throw away that PC when CA 2011 Expires next June?
No. If you want, you can manually download and "append" the Microsoft Corporation kek 2k ca 2023 certificate into your system BIOS and "append" the old certificate into DBX section.

My M/B is from late 2014 and KEK 2K CA 2023 was automatically (from MS servers) loaded into the BIOS thru the same registry entry as you applied and I appended the old cert into the DBX section manually.

Hope this helps.

Edit: I don't know if we can append old KEK into DBX section.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
    Cooling
    Zalman CNPS7X Tower
    Keyboard
    Microsoft AIO Wireless (includes touchpad)
    Mouse
    HP S1000 Plus Wireless
    Internet Speed
    500 Mb fiber optic
    Browser
    Chrome; MS Edge
    Antivirus
    Windows Defender
  • Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
    Graphics card(s)
    Intel integrated
    Screen Resolution
    1440 by 900 pixels
    Hard Drives
    128 GB
    Keyboard
    Built-in
    Mouse
    Microsoft Wireless
    Internet Speed
    802.11 ac
    Browser
    Chrome; Safari
    Antivirus
    N/A
@fg2001gf11F These are the related screenshots:

KEK.webp

DBX.webp

This is my system as it exists today (Thanks to @garlin )

Screenshot 2025-12-03 082756.webp
 

My Computers

System One System Two

  • OS
    Windows 11 Pro build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Built
    CPU
    Intel i7-4790
    Motherboard
    Asus H97 Pro Gamer with add-on TPM1.2 module
    Memory
    Teams DDR3-1600 4x4 GB
    Graphics Card(s)
    MSI Nvidia GeForce GTX 1050Ti
    Sound Card
    Realtek ALC1150
    Monitor(s) Displays
    Dell P2425D
    Screen Resolution
    2560 by 1440 pixels
    Hard Drives
    Corsair NVMe M.2 Core XT 1000 GB (Windows 11 v.25H2); Samsung SATA Evo 870 500 GB (Windows 11 v.25H2);
    PSU
    Corsair HX850
    Case
    Gigabyte Solo 210
    Cooling
    Zalman CNPS7X Tower
    Keyboard
    Microsoft AIO Wireless (includes touchpad)
    Mouse
    HP S1000 Plus Wireless
    Internet Speed
    500 Mb fiber optic
    Browser
    Chrome; MS Edge
    Antivirus
    Windows Defender
  • Operating System
    MacOS 12 Monterey
    Computer type
    Laptop
    Manufacturer/Model
    Apple Macbook Air
    CPU
    Intel Core i5
    Memory
    8 GB
    Graphics card(s)
    Intel integrated
    Screen Resolution
    1440 by 900 pixels
    Hard Drives
    128 GB
    Keyboard
    Built-in
    Mouse
    Microsoft Wireless
    Internet Speed
    802.11 ac
    Browser
    Chrome; Safari
    Antivirus
    N/A

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