Microsoft has fixed a known issue that caused File History backups to fail on some Windows systems after the September 2026 security updates. The problem triggered backup and restore errors, drive reconnection alerts, and crash events involving FileHistory.exe and KERNELBASE.dll. #Microsoft #FileHistory #FileHistory.exe #KERNELBASE.dll
Keypoints
- September 2026 Windows security updates broke File History on some systems.
- Affected users saw backup failures and restore problems.
- Event Viewer showed crashes involving FileHistory.exe and KERNELBASE.dll.
- Some Windows 10 and Windows 11 users received false “Reconnect your drive” alerts.
- Microsoft fixed the issue in optional preview updates and will include it in the next Patch Tuesday release.