Microsoft warned that the built-in File History backup feature in Windows may stop working on some systems after installing the September 2026 security updates.

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. In a Saturday service alert seen by ...

Microsoft has issued a warning to Windows users who rely on the File History that the backup feature may not function after installing the September 2026 Windows security update. The problem affects ...

Microsoft confirms September 2026 Windows updates can break File History, stop new backups, and trigger “Reconnect your drive” warnings.

Microsoft has confirmed a regression in its September 2026 cumulative security updates that breaks File History, the built-in backup feature in Windows 10 and Windows 11. The bug causes local and ...