Microsoft warned that the built-in File History backup feature in Windows may stop working on some systems after the September 2026 security updates. Affected users may see backup errors, false reconnect prompts, and Event Viewer crashes tied to FileHistory.exe and KERNELBASE.dll. #FileHistory #FileHistory.exe #KERNELBASE.dll #Windows11 #Windows10
Keypoints
- File History may fail after installing the September 2026 Windows security updates.
- Affected systems can show FileHistory.exe and KERNELBASE.dll crash events.
- Users may see false “Reconnect your drive” messages even when backups are connected.
- The issue can prevent backups from updating and hide previous file versions.
- Impacted releases include Windows 10 and Windows 11, along with Enterprise LTSC versions.