Microsoft admits it broke a Windows 11 backup feature in the September update — here's how to fix it

Microsoft has fixed a bug that killed a backup feature, but it needs to regain the trust of users.

Microsoft: September updates break File History backup feature

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.
Tbreak

Windows 11 File History bug silently stops backups

The Windows 11 File History bug can stop backups and falsely ask users to reconnect a drive. KB5124010 includes the fix.

Windows 11’s File History bug is fixed, but it won’t install on its own

Microsoft confirmed a bug in Windows updates KB5124008 and KB5122878 is breaking File History backups on Windows 11 and 10.
Windows Latest

Microsoft confirms Windows 11 quietly stopped backing up your files due to a new bug in September 2026 update

Microsoft has finally admitted that Windows 11 may no longer correctly back up your files, even if you’ve configured the ...
techtimes

How to Backup Your Computer Safely: Step-by-Step Guide with Cloud and External Drive Options

Losing important computer data can be a nightmare. Whether due to hardware failure, accidental deletion, software corruption, or theft, data loss can disrupt your work and personal life. Regularly ...
BleepingComputer

Microsoft fixes bug that broke Windows File History backup feature

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 ...