Windows 11: KB5070311 Update

 

December 1, 2025—KB5070311 (OS Builds 26200.7309 and 26100.7309) Preview

Applies To

Release Date:

12/1/2025

Version:

OS Builds 26200.7309 and 26100.7309

​​​​​This non-security update for Windows 11, version 25H2 and 24H2 (KB5070311), improves functionality, performance, and reliability. 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 24H2 and version 25H2.