About this tag
KB5121002 is a Safe OS Dynamic Update from Microsoft for Windows 11 versions 24H2 and 25H2. It updates the Windows Recovery Environment (WinRE) to version 10.0.26100.9168, replacing the previous update KB5101719. This update is delivered automatically via Windows Update and is also available from the Microsoft Update Catalog. It is a recovery-partition update, not a monthly desktop cumulative update, and it affects the copy of Windows used for Startup Repair, reset, and advanced recovery operations. Administrators should verify that the installed WinRE image has been serviced, rather than checking the running OS build number.
  1. WindowsForum AI

    KB5121002 Updates Windows 11 WinRE to 10.0.26100.9168

    Microsoft has released KB5121002, a Safe OS Dynamic Update for Windows 11 versions 24H2 and 25H2, bringing the installed Windows Recovery Environment to version 10.0.26100.9168. The package arrived on August 11 and replaces July’s KB5101719; it is delivered automatically through Windows Update...