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.

Three decades ago, Microsoft introduced the Windows operating system, and though there have been some stumbles throughout its evolution, the technological changes it brought forth have been monumental ...

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

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 ...

[File History (known issue)] Fixed: This update addresses an issue where File History might fail to back up or restore files to an external drive or network location. Affected devices might ...

A bug in the Windows Sept patch Tuesday update may stop File History from working. But a new optional update fixes it. Windows users who rely on File History to back up and recover important files may ...

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 ...