Microsoft Windows 11 24H2 Update Version OS Builds 26200.8037 and 26100.8037

KB5079473 updates Windows 11 25H2 and 24H2 to OS Builds 26200.8037 and 26100.8037 with the latest security fixes plus non-security improvements from KB5077181. It also includes a servicing stack update, Secure Boot certificate rollout changes, and a fix for WDAC COM object allowlisting. Reference IDs: KB5083532, KB5085516.

• Includes the latest security fixes for Windows 11 25H2 and 24H2.
• Secure Boot: adds higher-confidence device targeting data to expand controlled rollout of new Secure Boot certificates.
• Windows Defender Application Control (WDAC): fixes COM object allowlisting behavior when endpoint security policy is stricter than the allowlisting policy.

• File Explorer search reliability improved when searching across multiple drives or This PC.
• Windows System Image Manager: improves trusted catalog file selection and adds a warning dialog to confirm trusted sources.
• Servicing stack update KB5083532 improves update installation reliability.

• Signing in with a Microsoft account might fail for Microsoft Teams Free and other apps; Microsoft Entra ID sign-ins are not affected.
• Affected Microsoft account sign-ins may also impact Microsoft Edge, Excel, Word, and Microsoft 365 Copilot when Microsoft account authentication is required.

• If previous updates are already installed, only the new updates in this package will be downloaded and installed.
• The Microsoft account sign-in issue is addressed in KB5085516.
• 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

Version: OS Builds 26200.8037 and 26100.8037

Release date: Mar 10, 2026