Win Update KB5121003 Windows 11 Cumulative Update build 26100.9168 (24H2) and 26200.9168 (25H2) - Aug. 11



 Microsoft Support:

Announcements and messages​

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

Windows Secure Boot certificate expiration
Important
Secure Boot certificates used by most Windows devices were set to expire starting in June 2026. Microsoft has been updating these certificates on PCs and non-managed business devices for the past months. Devices that haven’t received the newer certificates will continue to start, and standard Windows updates will continue to install. We will continue to install the newer certificates via Windows updates in the coming months.

End of updates
Windows 11, version 24H2 Home and Pro editions will reach end of updates on October 13, 2026. Devices running these editions will no longer receive fixes for known issues, time zone updates, technical support, or monthly security and preview updates containing protections from the latest security threats. Enterprise and Education editions remain supported until October 12, 2027.

To stay protected and up to date, we recommend you upgrade to the latest version of Windows 11.

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Reminder: Windows 11 version 24H2 reaching end of updates on October 13, 2026

Windows message center: On October 13, 2026, Windows 11, version 24H2 Home and Pro editions, and Windows 10 Enterprise LTSB 2016 will reach end of updates. After this date, devices running these editions will no longer receive monthly security and non-security preview updates containing...
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Change log

Change date​
Change description​
August 20, 2026Added a known issue, "Reports of certain games becoming unresponsive".
August 17, 2026Update added, "[Sharing] This update removes the Drop Tray experience (previously named Drag Tray) for devices where it was available. It also removes the associated setting under Settings > System > Multitasking. We are continuing to evaluate the experience and explore future enhancements."


Improvements​

This update includes improvements from the following previously released updates:
The following summary outlines key quality improvements addressed by this update. The bold text within the brackets indicates the item or area of the change.
  • [Security updates] This update provides security improvements. For more information about the security vulnerabilities resolved by this update, see the Security Update Guide
  • [Secure Boot] This update includes additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Certificate deployment via Windows updates continues across supported PCs and non-managed business devices in the coming months.
  • [Sharing] This update removes the Drop Tray experience (previously named Drag Tray) for devices where it was available. It also removes the associated setting under Settings > System > Multitasking. We are continuing to evaluate the experience and explore future enhancements.

    www.elevenforum.com

    Enable or Disable Drop Tray in Windows 11

    This tutorial will show you how to enable or disable the Drag/Drop Tray feature for your account in Windows 11. Starting with Windows 11 build 26100.4202 (24H2) and build 22631.5413 (23H2), sharing files in Windows is getting a lot easier and quicker with the Drag Tray feature. When you start...
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If you've already installed previous updates, your device will download and install only the new updates included in this package.

Components updates​

AI components
This release updates the following AI components to version 1.2605.856.0: Image Search, Content Extraction, Semantic Analysis, and Settings Model. To learn more, see Release information for AI components.

Servicing stack update
Includes KB5123304 (Build 26100.9156), which improves the reliability of the Windows update installation process. To learn more about SSUs, see Simplifying on-premises deployment of servicing stack updates.

Known issues in this update​

Symptoms

Microsoft received reports of issues involving inability to run certain games as expected after installing this update.

Ongoing investigation indicates that this issue is associated with certain peripherals or internal device components that support RGB lighting features. These devices might install drivers or software components with file names similar to inpoutx64. On systems where these drivers are found, launching certain games can trigger this issue.

Games identified in reports of this issue include ARC Raiders, MARVEL Tōkon: Fighting Souls, and THE FINALS. Reported symptoms include:
  • the game application becomes unresponsive
  • the game application closes without notice
  • the error "EXCEPTION_ACCESS_VIOLATION" is displayed
  • the device restarts without warning
If you are experiencing this issue or a similar issue, please use Feedback Hub to submit a report. You can open Feedback Hub by pressing the Windows logo key + F. For additional information, see Send feedback to Microsoft with the Feedback Hub app. Your reports are helpful to our investigation.

Next steps

Microsoft is investigating the interaction between these RGB-related components and the affected games. Additional details will be provided as they become available.

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.

Deployment​

If you deploy dynamic updates such as this update to an existing Windows image, ensure the boot.stl file is included as part of the installation media. Failure to include the file might prevent devices from successfully starting from the installation media and can result in error code 0xc0430001.

Note
The boot.stl file is used during Secure Boot validation and must match the Windows version and architecture of the image you are updating.

To ensure the boot.stl file is included as part of the installation media, do one of the following:
  • Use the Update WinPE script to update an existing Windows image. (Recommended)
  • Manually copy the boot.stl file from the device Windows\Boot\EFI folder to the corresponding folder on your installation media before deploying the update.
For information about how to apply Dynamic Update packages to existing Windows images, see Update Windows installation media with Dynamic Update.

Install this update​

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

Available​
Next Step​
✅This update downloads and installs automatically from Windows Update and Microsoft Update.
✅To install this release from the Microsoft Update Catalog, select the option that matches your device architecture (arm64 or x64), and then follow the instructions.

File information​

For a list of the files provided in this update, download the file information for cumulative update KB5121003.

For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5123304) - version 26100.9156.


 Source:

August 11, 2026—KB5121003 (OS Builds 26200.9168 and 26100.9168) | Microsoft Support

August 11, 2026—KB5121003 (OS Builds 26200.9168 and 26100.9168)
support.microsoft.com support.microsoft.com


Check Windows Updates


ISO from Microsoft MCT:

www.elevenforum.com

Download Official Windows 11 ISO file from Microsoft

This tutorial will show you how to download an official Windows Server or Windows 11 64-bit or ARM64 ISO file from Microsoft. Microsoft provides ISO files for Windows Server and Windows 11 to download. You can use these ISO files to clean install or in-place upgrade Windows 11. The Flight Hub...
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UUP Dump:

64-bit ISO download:
uupdump.net

Select language for Windows 11, version 24H2 (26100.9168) amd64

Select language for Windows 11, version 24H2 (26100.9168) amd64 on UUP dump. UUP dump lets you download Unified Update Platform files, like Windows Insider updates, directly from Windows Update.
uupdump.net
uupdump.net

Select language for Windows 11, version 25H2 (26200.9168) amd64

Select language for Windows 11, version 25H2 (26200.9168) amd64 on UUP dump. UUP dump lets you download Unified Update Platform files, like Windows Insider updates, directly from Windows Update.
uupdump.net

ARM64 ISO download:
uupdump.net

Select language for Windows 11, version 24H2 (26100.9168) arm64

Select language for Windows 11, version 24H2 (26100.9168) arm64 on UUP dump. UUP dump lets you download Unified Update Platform files, like Windows Insider updates, directly from Windows Update.
uupdump.net
uupdump.net

Select language for Windows 11, version 25H2 (26200.9168) arm64

Select language for Windows 11, version 25H2 (26200.9168) arm64 on UUP dump. UUP dump lets you download Unified Update Platform files, like Windows Insider updates, directly from Windows Update.
uupdump.net

www.elevenforum.com

UUP Dump - Download Windows Insider ISO

UUP Dump is the most practical and easy way to get ISO images of any Insider Windows 10 or Windows 11 version, as soon as Microsoft has released a new build. UUP Dump creates a download configuration file according to your choices, downloads necessary files directly from Microsoft servers, and...
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Last edited:
Click to expand...
Zardoc said:
OK, update. This build does mess-up Snagit. I rolled back to 9168 and the problem is gone.
Click to expand...
Back to 9168? 🤔 AFAIK, that is the current build.
 

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    Win 11 Pro 25H2, Build 26200.9168Intel Core i5 14500, 14th Generation64GB DDR4GeForce RTX 4060
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    Win 11 Pro 25H2, Build 26200.9168
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    Intel Core i5 14500, 14th Generation
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    Win 11 Pro 25H2, Build 26200.9168Intel Core i5 1440032GB DDR5Intel 700 Embedded GPU
    Operating System
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    Intel Core i5 14400
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    Intel 700 Embedded GPU
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    HP ENVY h8-1540t, (24GB RAM, 2TB SSD, 2TB HDD, Win11 Pro)
gunrunnerjohn said:
Back to 9168? 🤔 AFAIK, that is the current build.
Click to expand...
You're so right. I kept thinking myself I was on 9168. The problem is 9267. Sorry for confusing ya'll. :eyeroll: Snagit works fine on 9168
 

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Windows 11 EducationIntel® Core™ i9-13900K Desktop Processor 16 (...G.Skill Ripjaws V Series 32gb (2x16gb) DDR4 3...Asus Dual Geforce Rtx™ 3060 TI Edition 8gb Gddr6
OS
Windows 11 Education
Computer type
PC/Desktop
CPU
Intel® Core™ i9-13900K Desktop Processor 16 (8P+8E)
Motherboard
Asus TUF Gaming Z790-PLUS WIFI D4
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PSU
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Love fast boots
garlin said:
July Preview/August 2026 rolled out a workaround to some AIK v2 reporting errors, but it doesn't fix all of them because it depends on your TPM's HW features. If you have an older TPM chip, this error might not ever go away.

What happens is shortly after boot, Windows tries to read the TPM attestation details and finds out you don't have a fully compliant TPM under the new security rules. So your PC tries to reach out to a MS server to reconfirm the current security keys, and that request fails since your TPM doesn't meet the requirements.
Click to expand...

I have an AMD Ryzen 7 9800X3D and an MSI MAG X870E Tomahawk WiFi, so this chip and motherboard are pretty new. I don’t know why there could be a problem with my TPM. Have the workarounds already been rolled out, or will they be released with the August preview update next week?
 

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Windows 11 Pro
OS
Windows 11 Pro
Computer type
PC/Desktop
The workarounds are in the August update. But they don't cover all HW versions of TPM, some will continue to throw warnings.

You can continue to hope for a fix. Has anyone actually tried the ViveTool suggestion, and it didn't work for them? It doesn't change TPM security, just how Windows approaches auditing the TPM settings.
 

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Windows 7

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    Windows 11 Pro for WorkstationsIntel i7-8700K 5 GHz64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600...ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GD...
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    Windows 11 Pro for Workstations
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    Intel i7-8700K 5 GHz
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    ASUS ROG Maximus XI Formula Z390
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    2 x Samsung Odyssey G75 27"
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garlin said:
The workarounds are in the August update. But they don't cover all HW versions of TPM, some will continue to throw warnings.

You can continue to hope for a fix. Has anyone actually tried the ViveTool suggestion, and it didn't work for them? It doesn't change TPM security, just how Windows approaches auditing the TPM settings.
Click to expand...
Yes, I tried the vivetool hack. It worked. My computer successfully reverted to AIK v. 1. Thanks!
 

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Any update about this? Should i be worried? I got this error on 26h1.
 

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OS
Windows 11
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Asrock b760 pro rs
There's no real need for concern. This summer, Windows changed their method for evaluating your TPM's security. TPM's that don't meet the newer standard will throw an error, which is expected. It's actually a warning, but everything in the TPM category is always logged as an "error".

If you use the ViveTool command, it returns Windows to the previous measurement method.
 

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Windows 7
OS
Windows 7
garlin said:
There's no real need for concern. This summer, Windows changed their method for evaluating your TPM's security. TPM's that don't meet the newer standard will throw an error, which is expected. It's actually a warning, but everything in the TPM category is always logged as an "error".

If you use the ViveTool command, it returns Windows to the previous measurement method.
Click to expand...
Ok, so which CPU's have this newer version of TPM?
 

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    CPU
    Intel i9 14900KF
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    Windows Default

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    Windows 11 25H2Intel i7 6800K32GB DDR4 (Corsair)ASUS GTX 1080ti
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    Intel i7 6800K
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I don't think there's a list of CPU or discrete TPM models that will create Event 87 SCEP errors.
 

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