Microsoft: September Updates May Break File History Backup
Microsoft's warning signals a potential disruption to a built-in backup tool for some Windows users after the September 2026 updates.
· 1 min read · 2 sources
Microsoft has issued a warning that the File History backup feature in Windows may stop working on some systems after the September 2026 security updates are installed. The advisory does not specify which systems are affected or what causes the failure.
The warning is specific to the September 2026 updates, so systems that have not yet applied them are unlikely to encounter the issue. Microsoft has not provided additional details beyond the initial notice.
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