New Emergency Windows 11 25H2 March Update – New Critical Issue Fixed (Build 26200.8039 or KB5085516)

In this article, we will talk about a New Windows 11 25H2 Emergency Update, that Microsoft released to apply a Fix for a Known Critical Issue.

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.

New Improvements in this Update

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.

How to Install this Update

To install this Update, simply Check for Updates in the Settings App through the Windows Update Section.

For more info about this Update, you can check this article from the Microsoft Blog.

For a more in-depth presentation of the New Update, you can watch the video below from the YouTube channel.