Win Update KB5085516 Windows 11 Out-of-band Update build 26100.8039 (24H2) and 26200.8039 (25H2) - March 21

UPDATE 3.26:

March 21, 2026 - KB5085516 (OS Builds 26200.8039 and 26100.8039) Out-of-band​

This out-of-band update for Windows 11, version 25H2 and 24H2 (KB5085516) is cumulative. It includes updates from previous security and non-security releases, along with an additional fix. 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 25H2 and 24H2.

Improvements​

This OOB contains quality improvements from KB5079473 (released March 10, 2026). The following summary outlines key issues addressed by this update. The bold text within the brackets indicates the item or area of the change.

• [Microsoft account sign in] Fixed: After you install the Windows update released on or after March 10, 2026, some users might experience an issue signing in to apps with a Microsoft account. Even when the device has a working Internet connection, a “no Internet” error appears during sign in and prevents access to Microsoft services and apps such as Microsoft Teams Free and OneDrive.
  
  Note: Only sign ins using Microsoft accounts are affected. Businesses using Microsoft Entra ID for app authentication will not experience this issue.

This update is offered through Windows Update for devices running Windows 11 that have already installed KB5079473. It is also available for manual download from the Microsoft Update Catalog.

Devices with Get the latest updates as soon as they’re available turned on will receive this update automatically. If this setting is turned off, you can install the update manually by going to Settings > Windows Update and selecting Download & install.

Note: IT administrators using Microsoft Intune or Windows Autopatch should follow the guidance below for installing the OOB update via Windows Update.

• Expedite Windows quality updates in Microsoft Intune
• Deploy an expedited quality update using Windows Autopatch

AI Components​

This release updates the following AI components:

Windows 11 servicing stack update (KB5083532)- 26100.8035​

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​

Microsoft is not currently aware of any issues with this update.

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.

Install this update

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


If you want to remove the LCU

Before you decide to remove the LCU, see Understanding the risks: Why you should not uninstall security updates.

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 5085516.

For a list of the files provided in the servicing stack update, download the file information for the SSU (KB5083532) - version 26100.8035.





Check Windows Updates


UUP Dump:

64-bit ISO download:

ARM64 ISO download: