Win Update KB5066835 Windows 11 Cumulative Update build 26100.6899 (24H2) and 26200.6899 (25H2) - Oct. 14


UPDATE 10/28:


 Microsoft Support:

October 14, 2025 - KB5066835 (OS Builds 26200.6899 and 26100.6899)​

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.


To learn more about Windows update terminology, see types of Windows updates and monthly quality update types. For an overview, see the update history page for Windows 11, version 24H2 and version 25H2.

Stay informed! Follow @WindowsUpdate for the latest updates from the Windows Release Health Dashboard.

Windows Updates do not include updates for Microsoft Store apps.

If you're an enterprise user, see Microsoft Store apps - Configuration Manager.
If you're a consumer user, see Get updates for apps and games in Microsoft Store.


Change Log

Change date​
Change description​
October 22, 2025
October 19, 2025
  • Added the following new improvement included in this update:

    [Cryptography] This update enforces a security hardening improvement by requiring use of Key Storage Provider (KSP) instead of Cryptographic Service Provider {CSP) for RSA-based smart card certificates. If you experience problems with smart card authentication as a result of this design change, see the Windows Release Health site for resolution steps. For additional details, see CVE-2024-30098.

Highlights

  • This update addresses security issues for your Windows operating system.

Improvements

This security update contains fixes and quality improvements from KB5065789 (released September 29, 2025). The following summary outlines key issues addressed by this update. Also, included are available new features. The bold text within the brackets indicates the item or area of the change.
  • [Browser] Fixed: This update addresses an issue that caused the print preview screen to stop responding in Chromium-based browsers.
  • [Gaming] Fixed: An issue occurred when users signed in to a Windows device using only a Gamepad at the lock screen. If no other input methods—such as touch or fingerprint—were used during sign-in, apps and games did not respond to input afterward.
  • [PowerShell]
    • Fixed: This update addresses an issue that affects PowerShell Remoting and Windows Remote Management (WinRM), where commands might time out after 10 minutes.
    • Fixed: This update addresses an issue that prevented an audit event from being logged.
  • [Windows Hello] Fixed: This update addresses an issue that affects the setup process for Windows Hello face recognition when using USB infrared camera modules. Users were unable to complete setup due to a persistent error message, such as “Make sure your face is centered in the frame.”
  • [Compatibility] This update removes the ltmdm64.sys driver. Fax modem hardware dependent on this specific driver will no longer work in Windows.
  • [Cryptography] This update enforces a security hardening improvement by requiring use of Key Storage Provider (KSP) instead of Cryptographic Service Provider {CSP) for RSA-based smart card certificates. If you experience problems with smart card authentication as a result of this design change, see the Windows Release Health site for resolution steps. For additional details, see CVE-2024-30098.
  • [File Explorer] After installing this update, File Explorer automatically disables the preview feature for files downloaded from the internet. This change is designed to enhance security by preventing a vulnerability when users preview potentially unsafe files. For details, including steps to unblock files, see File Explorer automatically disables the preview feature for files downloaded from the internet.
If you've already installed previous updates, your device will download and install only the new updates included in this package.

For more information about security vulnerabilities, see the Security Update Guide website and the October 2025 Security Updates.

AI Components

This release updates the following AI components:

AI ComponentVersion
Image Search1.2509.1022.0
Content Extraction1.2509.1022.0
Semantic Analysis1.2509.1022.0
Settings Model1.2509.1022.0

Windows 11 servicing stack update (KB5067360)- 26100.6893

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 Problems playing protected content in some BluRay/DVD/Digital TV apps

Symptoms
Some Digital TV and Blu-ray/DVD apps might not play protected content as expected after installing the August 29, 2025, Windows non-security preview update (KB5064081), or later updates.

Apps that use Enhanced Video Renderer with HDCP enforcement or Digital Rights Management (DRM) for digital audio might show copyright protection errors, frequent playback interruptions, unexpected stops, or black screens.

Streaming services are not affected.

Workaround
This issue is partially resolved. Problems affecting certain applications that use Enhanced Video Renderer with HDCP enforcement have been addressed in the September 2025 Windows preview update (KB5065789) and later updates.

We recommend installing the latest update for your device. It includes important improvements and fixes, including a resolution for this issue.

However, some apps that use DRM for digital audio might still experience problems.

We’re investigating a long-term solution for affected apps and will share more information when it's available.

2 USB mouse and keyboard not working in the Windows Recovery Environment

Symptoms
After installing October 2025 security update (KB5066835), USB devices, such as keyboards and mice, do not function in the Windows Recovery Environment (WinRE). This issue prevents navigation of any of the recovery options within WinRE. Note that the USB keyboard and mouse continue to work normally within the Windows operating system.

Workaround
This issue is addressed in KB5070773.

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
This update downloads and installs automatically from Windows Update and Microsoft Update.
Yes 1Before 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 KB5066835 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-KB5066835-x64.msu

Or, run the following command from an elevated Windows PowerShell prompt:

Add-WindowsPackage -Online -PackagePath "c:\packages\Windows11.0-KB5066835-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-KB5066835-x64.msu

Or, run the following command from an elevated Windows PowerShell prompt:

Add-WindowsPackage -Path "c:\offline" -PackagePath "Windows11.0-KB5066835-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-kb5066835-x64_199ed7806a74fe78e3b0ef4f2073760000f71972.msu

1 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 5066835.

For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5067360) - version 26100.6893.


 Source:



Check Windows Updates


ISO or USB from Microsoft Media Creation Tool (MCT):



UUP Dump:

64-bit ISO download:

ARM64 ISO download:

 
Last edited:
I think Microsoft need to step back, take a deep breath, and start adding some QC testing to their releases! I thought that's what the Insider program was supposed to do, but it seems even after the pre-releases the general release is filled with obvious bugs!
 

My Computers

System One System Two

  • OS
    Win 11 Pro 25H2, Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Brew
    CPU
    Intel Core i5 14500
    Motherboard
    Gigabyte B760M G P WIFI
    Memory
    64GB DDR4
    Graphics Card(s)
    GeForce RTX 4060
    Sound Card
    Chipset Realtek
    Monitor(s) Displays
    LG 45" Ultragear, Acer 24" 1080p
    Screen Resolution
    5120x1440, 1920x1080
    Hard Drives
    Crucial P310 2TB 2280 PCIe Gen4 3D NAND NVMe M.2 SSD (O/S)
    Silicon Power 2TB US75 NVMe PCIe Gen4 M.2 2280 SSD (backup)
    Crucial BX500 2TB 3D NAND (2nd backup)
    Seagate 4TB Ironwolf, rotating HDD archive files
    External off-line backup Drives: 2 NVMe 4TB drives in external enclosures
    PSU
    Thermaltake Toughpower GF3 750W
    Case
    LIAN LI LANCOOL 216 E-ATX PC Case
    Cooling
    Lots of fans!
    Keyboard
    Microsoft Comfort Curve 2000
    Mouse
    Logitech G305
    Internet Speed
    Verizon FiOS 1GB
    Browser
    Firefox
    Antivirus
    Malware Bytes & Windows Defender Security
  • Operating System
    Win 11 Pro 25H2, Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Home Brew
    CPU
    Intel Core i5 14400
    Motherboard
    Gigabyte B760M DS3H AX
    Memory
    32GB DDR5
    Graphics card(s)
    Intel 700 Embedded GPU
    Sound Card
    Realtek Embedded
    Monitor(s) Displays
    27" HP 1080p
    Screen Resolution
    1920x1080
    Hard Drives
    Crucial P310 2TB 2280 PCIe Gen4 eD NAND PCIe SSD
    Samsung EVO 990 2TB NVMe Gen4 SSD
    Samsung 2TB SATA SSD
    PSU
    Thermaltake Smart BM3 650W
    Case
    Okinos Micro ATX Case
    Cooling
    Fans
    Keyboard
    Microsoft Comfort Curve 2000
    Mouse
    Logitech G305
    Internet Speed
    Verizon FiOS 1GB
    Browser
    Firefox
    Antivirus
    Malware Bytes & Windows Defender Security
Thanks, Brink...... build 26200.6899 came through for me with flying colors, no issues, thus far.
Some things never change.....YOU are STILL the BEST! 👍👏
 

My Computer

System One

  • OS
    Windows 11 Pro 25H2 OS Build 26200.7705
    Computer type
    PC/Desktop
    Manufacturer/Model
    HP ENVY 700-515xt CTO (mATX platform)
    CPU
    Gen 5 Haswell i7-4770
    Motherboard
    OEM (Asus)
    Memory
    32 GB G. SKILL DDR-3 Ripjaws X- 8GB x 4
    Graphics Card(s)
    Integrated Intel 4600 (112MB)
    Sound Card
    OEM
    Monitor(s) Displays
    HP 27eb
    Screen Resolution
    1920 x 1080
    Hard Drives
    Samsung 860 PRO 256GB, SG ST1000DM003-1CH162, Barracuda 7200.14 Series, 1 TB storage, 64MB cache and a SATA 6Gb/s interface (Hard drive is used for Storage only)
    PSU
    OEM 350W
    Case
    OEM
    Cooling
    OEM (ACPI fans)
    Keyboard
    Logitech K120
    Mouse
    Logitech M100
    Internet Speed
    440.1 Down/ 11.2 Up, 13 ms latency, server based in Chicago, IP- Spectrum in Midland, MI
    Browser
    Google Chrome
    Antivirus
    MS Defender
  • Like
Reactions: Gas
Just some FYI:

Microsoft confirmed that Windows 11 KB5066835 breaks localhost (127.0.0.1) HTTP/2 connections, which means locally hosted apps can no longer connect to your network, but that’s not the only problem. Windows 11 KB5066835 is causing the following issues for some users on version 24H2 or 25H2:


Thanks for this. My only source before was a blog from Japan and my own testing. At least it confirms what I have seen and heard from other people here.
 

My Computer

System One

  • OS
    Windows 11 Home 25H2 26200.6901
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom
    CPU
    AMD 9800X3D
    Motherboard
    MSI B850 Gaming Plus Wifi
    Memory
    Patriot Viper
    Graphics Card(s)
    EVGA GeForce RTX 3070 Ti FTW3 ULTRA GAMING
    Sound Card
    Realtek 7.1 Surround Sound High Definition Audio CODEC (Built-in w/ Motherboard)
    Monitor(s) Displays
    ACER XG270HU
    Screen Resolution
    2560x1440 144hz
    Hard Drives
    Samsung 980 PRO NVMe M.2 PCI-E x4 SSD, 1TB for OS/Apps
    Western Digital Blue Series 3D NAND SATA III 2.5in Solid State Drive, 2TB (Games)
    PSU
    Corsair RM White Series RM850 80+ Gold Modular ATX Power Supply, 850W
    Case
    NXZT H9 Flow
    Cooling
    Be Quiet Light Loop 360
    Keyboard
    Razer Cynosa V2
    Mouse
    Razer Naga Trinity
    Internet Speed
    Cable 934Mbps download 50Mbps Upload
    Browser
    Edge/Chrome
    Antivirus
    Windows Antivirus/Defender. Bitdefender when not Troubleshooting
For anyone else having this problem with unsupported hardware and none of the solutions mentioned in this thread worked, here's what worked for me with my wife's older ASUS laptop that was initially updated from Windows 10 > 11 using Flyby11:

- Download and run Flyoobe (same developer as Flyby11) GitHub - builtbybel/Flyoobe: Fly through your Windows 11 setup 🐝
- Run the portable Flyo.exe
- Navigate to "Reinstall"
- Select "Media Creation Tool (Windows 11 Version 25H2)"
- Hit Download to get mct.exe (Media Creation Tool)
- Run mct.exe and create the Windows.iso file
- Back in Flyoobe, select "Mount ISO... (built-in)" and hit Run to mount the ISO
- Select "Repair upgrade (keeps apps & files)", hit Run and follow the prompts

There may be a simpler procedure, but this was the first time running Flyoobe and I just did what was familiar/made sense to me.
This is basically the same thing as the native "Fix problems using Windows Update > Reinstall Now", but that resulted in an "Unsupported Hardware" error and wouldn't continue. As per the Technical Overview on the Flyoobe GitHub site, it uses the Windows Server variant of setup which skips hardware checks but still installs normal Windows 11.

Once completed, another check for updates found KB5066835 again, but this time it downloaded and installed successfully without even prompting for a reboot. Some customization was lost, but easily reverted. Also using ExplorerPatcher on this laptop and all those settings persisted.

1760808751291.webp

Was it worth it? If you get OCD over these things, especially if it's just one ****ing machine out of multiple on your network that wouldn't update, then yeah.
However, if you have the mental fortitude to just leave it be and wait for an official fix from MS, then probably not ;-)
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
Microsoft is to concerned about AI and Copilot Than any problems a user may have.
 

My Computers

System One System Two

  • OS
    Windows11 Pro 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Dell Alienware Aurora R16
    CPU
    Intel Core i9 14900F (24 -Core, 68 MB Total Cache)
    Motherboard
    Dell Alienware
    Memory
    32GB DDR5
    Graphics Card(s)
    RTX 4080 Super w/581.95
    Sound Card
    Realtec
    Monitor(s) Displays
    Corsair XENEON 32QHD165
    Screen Resolution
    2560 X 1440
    Hard Drives
    1-2TB Samsung 990 Pro PCIe NVMe M2 SSD
    1-4TB Samsung 990 Pro PCIe NVMe M2 SSD
    PSU
    1000 Watt Platinum Dell
    Case
    Alienware
    Cooling
    Liquid Closed Loop
    Keyboard
    Logitech MK270 Wireless Keyboard
    Mouse
    Logitech MK270 Wireless
    Internet Speed
    100Gb's Down-20 Up
    Browser
    Firefox 151.0.2
    Antivirus
    Defender
    Other Info
    Very Quiet And Fast
    CyberPower UPS CP1500PFCLCD
  • Operating System
    PClinuxOS Mate (2025.7)
    Computer type
    PC/Desktop
    Manufacturer/Model
    Intel
    CPU
    13th Gen Inter(R) Core(TM) i3-1315U
    Motherboard
    Intel
    Memory
    64 GB DDR4 @3200 MHz.
    Graphics card(s)
    Internal
    Sound Card
    None
    Monitor(s) Displays
    Dell 2419HGCF
    Screen Resolution
    1920 X 1080
    Hard Drives
    SAMSUNG 980 PRO SSD 2TB, PCIe 4.0 M.2 2280
    PSU
    Chicony 30 Watt
    Case
    Small
    Keyboard
    Dell
    Mouse
    Razor
    Internet Speed
    1GB
    Browser
    Slimjet
This isn't a fix, it's a rollback.
Microsoft is going to release a real fix.
I hope so. 🤞

 

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

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
Sorry if this question has been answered before. There are so many pages to go through to find the answer.

I successfully installed this on 24H2

2025-10 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5066835) (26100.6899)
Successfully installed on ‎15/‎10/‎2025

Now I am being offered 25H2 via windows update. Reading all of these problems I am scared to upgrade to 25H2. Will I be fine to move to 25H2 or should I wait? Does this bug/error apply to me?

Thank you.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self built PC by me.
    CPU
    Intel Core i5-12600K 3.7 GHz 10-Core Processor
    Motherboard
    Gigabyte B760M H DDR4 Micro ATX LGA1700 Motherboard
    Memory
    Corsair Vengeance LPX 64 GB (2 x 32 GB) DDR4-3200 CL16 Memory
    Graphics Card(s)
    Integrated Intel UHD Graphics 770
    Sound Card
    Realtek
    Monitor(s) Displays
    LG
    Hard Drives
    Samsung 990 Pro 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
    Samsung 990 Pro 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
    PSU
    NZXT 850w ATX 3.1 Gold Fully Modular Power Supply
    Case
    Thermaltake Versa H25 ATX Mid Tower Case
    Cooling
    CPU Cooler Thermalright Assassin Spirit 120 EVO ARGB (ARGB Disabled) - Case Fans BlackThermalright TL-C12C-S X3 66.17 CFM 120 mm Fans 3-Pack (ARGB disabled)
    Internet Speed
    1 Gbps
    Other Info
    I hate ARGB.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 14 G2 ITL
Sorry if this question has been answered before. There are so many pages to go through to find the answer.

I successfully installed this on 24H2

2025-10 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5066835) (26100.6899)
Successfully installed on ‎15/‎10/‎2025

Now I am being offered 25H2 via windows update. Reading all of these problems I am scared to upgrade to 25H2. Will I be fine to move to 25H2 or should I wait? Does this bug/error apply to me?

Thank you.



Yeah. Just use the Enablement Package.
It takes 3 seconds and a reboot.


 

My Computers

System One System Two

  • OS
    Win 11 Home ♦♦♦26200.8457 ♦♦♦♦♦♦♦25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® [May 2020]
    CPU
    AMD Ryzen 7 3700X
    Motherboard
    Asus Pro WS X570-ACE (BIOS 5302)
    Memory
    G.Skill (F4-3200C14D-16GTZKW)
    Graphics Card(s)
    EVGA RTX 2070 (08G-P4-2171-KR)
    Sound Card
    Realtek ALC1220P / ALC S1220A
    Monitor(s) Displays
    Dell U3011 30"
    Screen Resolution
    2560 x 1600
    Hard Drives
    2x Samsung 860 EVO 500GB,
    WD 4TB Black FZBX - SATA III,
    WD 8TB Black FZBX - SATA III,
    DRW-24B1ST CD/DVD Burner
    PSU
    PC Power & Cooling 750W Quad EPS12V
    Case
    Cooler Master ATCS 840 Tower
    Cooling
    CM Hyper 212 EVO (push/pull)
    Keyboard
    Ducky DK9008 Shine II Blue LED
    Mouse
    Logitech Optical M-100
    Internet Speed
    300/300
    Browser
    Firefox (latest)
    Antivirus
    Bitdefender Total Security
    Other Info
    Speakers: Klipsch Pro Media 2.1
  • Operating System
    Windows XP Pro 32bit w/SP3
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® (not in use)
    CPU
    AMD Athlon 64 X2 5000+ (OC'd @ 3.2Ghz)
    Motherboard
    ASUS M2N32-SLI Deluxe Wireless Edition
    Memory
    TWIN2X2048-6400C4DHX (2 x 1GB, DDR2 800)
    Graphics card(s)
    EVGA 256-P2-N758-TR GeForce 8600GT SSC
    Sound Card
    Onboard
    Monitor(s) Displays
    ViewSonic G90FB Black 19" Professional (CRT)
    Screen Resolution
    up to 2048 x 1536
    Hard Drives
    WD 36GB 10,000rpm Raptor SATA
    Seagate 80GB 7200rpm SATA
    Lite-On LTR-52246S CD/RW
    Lite-On LH-18A1P CD/DVD Burner
    PSU
    PC Power & Cooling Silencer 750 Quad EPS12V
    Case
    Generic Beige case, 80mm fans
    Cooling
    ZALMAN 9500A 92mm CPU Cooler
    Keyboard
    Logitech Classic Keybooard 200
    Mouse
    Logitech Optical M-BT96a
    Internet Speed
    300/300
    Browser
    Firefox 3.x ??
    Antivirus
    Symantec (Norton)
    Other Info
    Still assembled, still runs. Haven't turned it on for 15 years?
Sorry if this question has been answered before. There are so many pages to go through to find the answer.

I successfully installed this on 24H2

2025-10 Cumulative Update for Windows 11 Version 24H2 for x64-based Systems (KB5066835) (26100.6899)
Successfully installed on ‎15/‎10/‎2025

Now I am being offered 25H2 via windows update. Reading all of these problems I am scared to upgrade to 25H2. Will I be fine to move to 25H2 or should I wait? Does this bug/error apply to me?

Thank you.

If Windows Update is offering it, take it. Make a system image before you proceed. Then you can always go back.

I have clean installed 25H2 and I am pleasantly surprised. I can’t speak for an upgrade via Windows Update, as I never installed or updated to 24H2
 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Sin-built 2013
    CPU
    Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
    Motherboard
    ASUS ROG Maximus VI Formula
    Memory
    32.0 GB of I forget and the box is in storage.
    Graphics Card(s)
    Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
    Sound Card
    Onboard thingy
    Monitor(s) Displays
    5 x LG 25MS500-B - 1 x 24MK430H-B - 1 x Wacom Pro 22" Touch Screen Tablet
    Screen Resolution
    All over the place
    Hard Drives
    Too many to list.
    OS on Samsung 1TB 870 QVO SATA
    PSU
    Silverstone 1500
    Case
    NZXT Phantom 820 Full-Tower Case
    Cooling
    Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
    Keyboard
    Corsair K95 / Logitech diNovo Edge Wireless
    Mouse
    Logitech: G402 / G502 / Mx Masters / Mx Air Cordless
    Internet Speed
    2000/500Mbps
    Browser
    All sorts
    Antivirus
    Kaspersky Premium
    Other Info
    ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
    TP-Link BE9300 WiFi 7 Bluetooth 5.4 (Archer TBE550E)
    TP-Link TX201 V1 2.5GB Lan

    Grandstream HT812 - VoIP
    ASUS DSL-AX82U - Mesh
    ASUS RT-AC68U - Mesh
    ASUS RT-BE88U Router

    Brother MFC-L2880DW Printer

    I’m on a horse.
  • Operating System
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    Laptop
    Manufacturer/Model
    LENOVO Yoga 7 14IRL8 - 7i EVO OLED 14" Touchscreen i5 12 Core 16GB/512GB
    CPU
    Intel Core 12th Gen i5-1240P Processor (1.7 - 4.4GHz)
    Memory
    16GB LPDDR5 RAM
    Graphics card(s)
    Intel Iris Xe Graphics Processor
    Sound Card
    Optimized with Dolby Atmos®
    Screen Resolution
    QHD 2880 x 1800 OLED
    Hard Drives
    M.2 512GB
    Antivirus
    Defender / Malwarebytes
    Other Info
    …still on a horse.
Now I am being offered 25H2 via windows update

If you’d rather not, then specify updates for 24H2 only

 

My Computers

System One System Two

  • OS
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Sin-built 2013
    CPU
    Intel(R) Core(TM) i7-4770K CPU @ 3.50GHz
    Motherboard
    ASUS ROG Maximus VI Formula
    Memory
    32.0 GB of I forget and the box is in storage.
    Graphics Card(s)
    Gigabyte nVidia GeForce GTX 1660 Super OC 6GB
    Sound Card
    Onboard thingy
    Monitor(s) Displays
    5 x LG 25MS500-B - 1 x 24MK430H-B - 1 x Wacom Pro 22" Touch Screen Tablet
    Screen Resolution
    All over the place
    Hard Drives
    Too many to list.
    OS on Samsung 1TB 870 QVO SATA
    PSU
    Silverstone 1500
    Case
    NZXT Phantom 820 Full-Tower Case
    Cooling
    Noctua NH-D15 Elite Class Dual Tower CPU Cooler / 6 x EziDIY 120mm / 2 x Corsair 140mm somethings / 1 x 140mm Thermaltake something / 2 x 200mm Corsair.
    Keyboard
    Corsair K95 / Logitech diNovo Edge Wireless
    Mouse
    Logitech: G402 / G502 / Mx Masters / Mx Air Cordless
    Internet Speed
    2000/500Mbps
    Browser
    All sorts
    Antivirus
    Kaspersky Premium
    Other Info
    ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀
    TP-Link BE9300 WiFi 7 Bluetooth 5.4 (Archer TBE550E)
    TP-Link TX201 V1 2.5GB Lan

    Grandstream HT812 - VoIP
    ASUS DSL-AX82U - Mesh
    ASUS RT-AC68U - Mesh
    ASUS RT-BE88U Router

    Brother MFC-L2880DW Printer

    I’m on a horse.
  • Operating System
    Windows 11 Pro 25H2 Build 26200.8524
    Computer type
    Laptop
    Manufacturer/Model
    LENOVO Yoga 7 14IRL8 - 7i EVO OLED 14" Touchscreen i5 12 Core 16GB/512GB
    CPU
    Intel Core 12th Gen i5-1240P Processor (1.7 - 4.4GHz)
    Memory
    16GB LPDDR5 RAM
    Graphics card(s)
    Intel Iris Xe Graphics Processor
    Sound Card
    Optimized with Dolby Atmos®
    Screen Resolution
    QHD 2880 x 1800 OLED
    Hard Drives
    M.2 512GB
    Antivirus
    Defender / Malwarebytes
    Other Info
    …still on a horse.
Reading all these issues makes me scared.

Ill just wait and see what is offered next patch Tuesday I guess.
Hopefully the 24H2 updates are still there if not then I go to 25H2.
 

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My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self built PC by me.
    CPU
    Intel Core i5-12600K 3.7 GHz 10-Core Processor
    Motherboard
    Gigabyte B760M H DDR4 Micro ATX LGA1700 Motherboard
    Memory
    Corsair Vengeance LPX 64 GB (2 x 32 GB) DDR4-3200 CL16 Memory
    Graphics Card(s)
    Integrated Intel UHD Graphics 770
    Sound Card
    Realtek
    Monitor(s) Displays
    LG
    Hard Drives
    Samsung 990 Pro 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
    Samsung 990 Pro 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
    PSU
    NZXT 850w ATX 3.1 Gold Fully Modular Power Supply
    Case
    Thermaltake Versa H25 ATX Mid Tower Case
    Cooling
    CPU Cooler Thermalright Assassin Spirit 120 EVO ARGB (ARGB Disabled) - Case Fans BlackThermalright TL-C12C-S X3 66.17 CFM 120 mm Fans 3-Pack (ARGB disabled)
    Internet Speed
    1 Gbps
    Other Info
    I hate ARGB.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 14 G2 ITL
Reading all these issues makes me scared.

Ill just wait and see what is offered next patch Tuesday I guess.
Hopefully the 24H2 updates are still there if not then I go to 25H2.


25H2 is already installed on your computer. It's all inside 24H2, just turned OFF.
The Enablement Package (or the 25H2 update), just turns those things ON.

MS did the same thing going from 22H2 to 23H2.


Honestly, I haven't seen any difference between 24H2 and 25H2. :-)
 

My Computers

System One System Two

  • OS
    Win 11 Home ♦♦♦26200.8457 ♦♦♦♦♦♦♦25H2
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® [May 2020]
    CPU
    AMD Ryzen 7 3700X
    Motherboard
    Asus Pro WS X570-ACE (BIOS 5302)
    Memory
    G.Skill (F4-3200C14D-16GTZKW)
    Graphics Card(s)
    EVGA RTX 2070 (08G-P4-2171-KR)
    Sound Card
    Realtek ALC1220P / ALC S1220A
    Monitor(s) Displays
    Dell U3011 30"
    Screen Resolution
    2560 x 1600
    Hard Drives
    2x Samsung 860 EVO 500GB,
    WD 4TB Black FZBX - SATA III,
    WD 8TB Black FZBX - SATA III,
    DRW-24B1ST CD/DVD Burner
    PSU
    PC Power & Cooling 750W Quad EPS12V
    Case
    Cooler Master ATCS 840 Tower
    Cooling
    CM Hyper 212 EVO (push/pull)
    Keyboard
    Ducky DK9008 Shine II Blue LED
    Mouse
    Logitech Optical M-100
    Internet Speed
    300/300
    Browser
    Firefox (latest)
    Antivirus
    Bitdefender Total Security
    Other Info
    Speakers: Klipsch Pro Media 2.1
  • Operating System
    Windows XP Pro 32bit w/SP3
    Computer type
    PC/Desktop
    Manufacturer/Model
    Built by Ghot® (not in use)
    CPU
    AMD Athlon 64 X2 5000+ (OC'd @ 3.2Ghz)
    Motherboard
    ASUS M2N32-SLI Deluxe Wireless Edition
    Memory
    TWIN2X2048-6400C4DHX (2 x 1GB, DDR2 800)
    Graphics card(s)
    EVGA 256-P2-N758-TR GeForce 8600GT SSC
    Sound Card
    Onboard
    Monitor(s) Displays
    ViewSonic G90FB Black 19" Professional (CRT)
    Screen Resolution
    up to 2048 x 1536
    Hard Drives
    WD 36GB 10,000rpm Raptor SATA
    Seagate 80GB 7200rpm SATA
    Lite-On LTR-52246S CD/RW
    Lite-On LH-18A1P CD/DVD Burner
    PSU
    PC Power & Cooling Silencer 750 Quad EPS12V
    Case
    Generic Beige case, 80mm fans
    Cooling
    ZALMAN 9500A 92mm CPU Cooler
    Keyboard
    Logitech Classic Keybooard 200
    Mouse
    Logitech Optical M-BT96a
    Internet Speed
    300/300
    Browser
    Firefox 3.x ??
    Antivirus
    Symantec (Norton)
    Other Info
    Still assembled, still runs. Haven't turned it on for 15 years?
Reading all these issues makes me scared.

Ill just wait and see what is offered next patch Tuesday I guess.
Hopefully the 24H2 updates are still there if not then I go to 25H2.
From what I understand the issues people are having, - network, installation, mouse and keyboard in WinRE, File Explorer document previews in the Preview pane, Logitech devices apply to both the 24H2 and 25H2 version of build 6899 so pick your poison. If you already have 26100.2899 then 26200.2899 probably won't be any different.
 

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
2025-10 Aggiornamento cumulativo per Windows 11 Version 24H2 per sistemi basati su x64 (KB5066835) (26100.6899)
Errore di installazione - 0x800f0983
Same issue on two HP laptops. I don't know if I should wait for a fix from Microsoft or try a new in-place upgrade from the ISO keeping apps and files.
Suggestions? Thank you.
 
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My Computer

System One

  • OS
    Windows 11 24H2
    Computer type
    Laptop
    Manufacturer/Model
    HP
    CPU
    AMD Ryzen 7 5700U
    Memory
    16 GB
Reading all these issues makes me scared.

Ill just wait and see what is offered next patch Tuesday I guess.
Hopefully the 24H2 updates are still there if not then I go to 25H2.
If you have a secure backup strategy in place, there is never any reason to be scared of updates.

You should always have several image backups you can restore to be right back where you were before the update.

You should always have multiple copies of all your data and photos, one of which must always be offsite.
 

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
I don't think there will ever be an official fix from MS to install to unsupported hardware.
Agreed, but I failed to preface all that by saying other machines with unsupported hardware took the update normally without any issues at all.
 

My Computer

System One

  • OS
    Windows 11
    Computer type
    PC/Desktop
Installed 25H2 via windows update. It took about 3 minutes.

Dism came back clean sfc scannow had errors and were fixed.
 

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My Computers

System One System Two

  • OS
    Windows 11 Pro
    Computer type
    PC/Desktop
    Manufacturer/Model
    Self built PC by me.
    CPU
    Intel Core i5-12600K 3.7 GHz 10-Core Processor
    Motherboard
    Gigabyte B760M H DDR4 Micro ATX LGA1700 Motherboard
    Memory
    Corsair Vengeance LPX 64 GB (2 x 32 GB) DDR4-3200 CL16 Memory
    Graphics Card(s)
    Integrated Intel UHD Graphics 770
    Sound Card
    Realtek
    Monitor(s) Displays
    LG
    Hard Drives
    Samsung 990 Pro 1 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
    Samsung 990 Pro 2 TB M.2-2280 PCIe 4.0 X4 NVME Solid State Drive
    PSU
    NZXT 850w ATX 3.1 Gold Fully Modular Power Supply
    Case
    Thermaltake Versa H25 ATX Mid Tower Case
    Cooling
    CPU Cooler Thermalright Assassin Spirit 120 EVO ARGB (ARGB Disabled) - Case Fans BlackThermalright TL-C12C-S X3 66.17 CFM 120 mm Fans 3-Pack (ARGB disabled)
    Internet Speed
    1 Gbps
    Other Info
    I hate ARGB.
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    Lenovo ThinkBook 14 G2 ITL
Installed 25H2 via windows update. It took about 3 minutes.

Dism came back clean sfc scannow had errors and were fixed.
What about the WinRE bug?
Try Shift + Restart and you will see that keyboard and mouse are not working while in recovery environment after updating to 26200.6899 and 26100.6899. 😵‍💫🤷‍♂️
 

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 about the WinRE bug?
Try Shift + Restart and you will see that keyboard and mouse are not working while in recovery environment after updating to 26200.6899 and 26100.6899. 😵‍💫🤷‍♂️
I wonder if those with old school PS2 mouse/keyboard ports (my MSI board has them B760M) would work?
 

My Computer

System One

  • OS
    Win 11 Pro 25H2 26200.8524
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom
    CPU
    Intel i5-12400F
    Motherboard
    MSI PRO B760M P
    Memory
    2 x16gb DDR4 Patriot Viper Elite II 4000MHz
    Graphics Card(s)
    ASUS GeForce RTX 3060 Dual OC 12GB
    Sound Card
    onboard Realtek
    Monitor(s) Displays
    KTC 32 inch 180Hz Curved Gaming Monitor
    Screen Resolution
    2560x1440
    Hard Drives
    1x SP 512GB NVME (Windows)
    1x 2TB SSD (Downloads)
    1x 2TB BX500 (Games)
    1x 2TB NVME (Steam)
    1x 1TB NVME (Macrium, Stuff)
    PSU
    CORSAIR RM750e (2025) Platinum Fully Modular
    Case
    CORSAIR Frame 4000D RS White
    Cooling
    Thermalright Assassin X120 SE ARGB White
    Keyboard
    Z-88 RGB Mechanical White
    Mouse
    Red Dragon 612 Predator RGB
    Internet Speed
    750/50
    Browser
    Chrome
    Antivirus
    Windows

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