Microsoft Fixes File History Backup Failures Caused by September Windows Updates

Microsoft has fixed a known issue that stopped the File History backup feature from working on some Windows PCs after the September 2026 security updates were installed. The fix ships in the optional KB5124010 and KB5124006 cumulative updates for Windows 11 , according to Microsoft, and Windows 11 users who skip those optional updates will receive it with the October 13 Patch Tuesday release. Microsoft first warned about the problem in a Saturday service alert on its Windows release health dashb