Microsoft fixes bug that broke Windows File History backup feature
Source Bleeping Computer
Rated by Threat Radar
Data as of 24 Sep 2026, 08:52 UTC
What to do
AI-suggested
Microsoft has released optional cumulative updates (KB5124006 and KB5124010) for Windows 11 versions 26H1 and 24H2/25H2 that resolve the File History backup issue. Users are recommended to install these updates to restore backup functionality. For users who do not install the optional updates, the fix will be included in the October 13, 2026 Patch Tuesday updates. No additional action is required beyond applying these updates. This is a functional bug fix, not a security vulnerability requiring emergency response.
Description
Microsoft has fixed a known issue that breaks the built-in File History backup feature on some Windows systems after installing the September 2026 security updates. [...]