Release Date:
3/11/2025
Version:
OS Build 26100.3476
Forinformation about Windows update terminology, seetypes of Windows updatesand themonthly quality update types. To find an overview of Windows 11, version 24H2, see itsupdate history page.
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Important:Windows updates do not install Microsoft Store application updates. If you are an enterprise user, seeMicrosoft Store apps - Configuration Manager. If you are aconsumer user, seeGet updates for apps and games in Microsoft Store.
Highlights
This update addresses security issues for your Windows operating system.
Improvements
This security update includes improvements that were a part of update KB5052093 (released February 25, 2025).This 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.
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This update makes miscellaneous security improvements to internal OS functionality. No additional issues were documented for this release.
If you installed earlier updates, your device downloads and installs only the new updates contained in this package.
For more information about security vulnerabilities, see theSecurity Update Guideand the March 2025 Security Updates.
Windows 11servicing stack update (KB5052915)- 26100.3321
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
Applies to: All users
Symptoms
We’re aware of an issue where players on Arm devices are unable to download and play Roblox from the Microsoft Store on Windows.
Workaround
Roblox is working on a resolution to address this issue. Please refer to the Roblox support site for updates. Until the resolution is available, players on Arm devices can play Roblox by downloading the title directly from www.Roblox.com.
Applies to: IT Admin
Symptoms
Devices that have certain Citrix components installed might be unable to complete installation of the January 2025 Windows security update. This issue was observed on devices withCitrix Session Recording Agent (SRA)version 2411. The 2411 version of this application was released in December 2024.
Affected devices might initially download and apply the January 2025 Windows security update correctly, such as via the Windows Update page in Settings. However, when restarting the device to complete the update installation, an error message with text similar to “Something didn’t go as planned. No need to worry – undoing changes” appears. The device will then revert to the Windows updates previously present on the device.
This issue likely affects a limited number of organizations as version 2411 of the SRA application is a new version. Home users are not expected to be affected by this issue.
Workaround
Citrix has documented this issue, including a workaround, which can be performed prior to installing the January 2025 Windows security update. For details, see Citrix’s documentation.
Microsoft is working with Citrix to address this issue and will update this documentation once a resolution is available.
Applies to: All Users.
Symptoms
We're aware of an issue with the Microsoft Copilot app affecting some devices. The app is unintentionally uninstalled and unpinned from the taskbar.
Note: This issue has not been observed with the Microsoft 365 Copilot app.
Workaround
Microsoft is working on a resolution to address this issue.
In the meantime, affected users can reinstall the app from the Microsoft Store and manually pin it to the taskbar.
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 updatesandServicing Stack Updates (SSU): Frequently Asked Questions.
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. |
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 nameby 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 that are provided in this update, download thefile information for cumulative update 5053598.
For a list of the files that are provided in the servicing stack update, download thefile information for the SSU (KB5052915) - version 26100.3321.
