Microsoft Windows 11 25H2 Update Version OS Builds 26200.8037 and 26100.8037

KB5079473 updates Windows 11 version 25H2 and 24H2 to OS Builds 26200.8037 and 26100.8037. It includes the latest security fixes, non-security improvements from KB5077181, and a servicing stack update KB5083532. Reference IDs: KB5085516.

• Includes the latest security fixes for Windows 11 version 25H2 and 24H2.
• Improves Secure Boot certificate targeting to expand controlled rollout of new certificates.
• Improves Windows Defender Application Control (WDAC) handling of COM object allowlisting policies.

• Improves File Explorer search reliability when searching across multiple drives or This PC.
• Improves reliability of choosing trusted catalog files in Windows System Image Manager and adds a warning dialog for trusted-source confirmation.

• Signing in with a Microsoft account might fail in Microsoft Teams Free and other apps, including Edge, Excel, Word, and Microsoft 365 Copilot. Microsoft Entra ID sign-ins are not affected.
• Workaround for the Microsoft account sign-in issue is available in KB5085516.

• This cumulative update includes non-security updates from last month's optional preview release.
• If previous updates are already installed, only the new updates in this package will be downloaded and installed.
• Windows Secure Boot certificates used by most devices are set to expire starting in June 2026; Microsoft recommends reviewing the certificate update guidance in advance.

Product Information

Vendor: Microsoft

Product: Windows 11

Product type: Software

Application category: Utilities

Platform: Windows

Variant: 25H2

Version: OS Builds 26200.8037 and 26100.8037

Vendor release date: Mar 10, 2026

Original release notes: View on vendor site

Published on updatealert.io: Jun 3, 2026

Description: Client operating system for modern desktop and enterprise environments.