AI Image
Microsoft: September updates break File History backup feature
BleepingComputer • • technology
Key Points:
- Microsoft has warned that the File History backup feature in Windows may stop working on some systems after installing the September 2026 security updates, causing issues with creating or updating backups.
- Affected users might see application crashes related to FileHistory.exe and KERNELBASE.dll, as well as incorrect "Reconnect your drive" messages despite connected backup drives.
- The problem impacts Windows 10 versions 21H2 and later, Windows 10 Enterprise LTSC 2016/2019, and Windows 11 versions 23H2 and later, with specific cumulative updates identified as the cause.
- Symptoms include the "Last Backup" timestamp not updating and previously backed-up files showing "No previous version available," hindering file recovery efforts.
- Microsoft previously released emergency updates to address other issues caused by the September 2026 patches but acknowledged ongoing problems, particularly with audio, remain unresolved.
