Skip to content
Windows 11 File History Backup Bug Affects Users After September Update

Windows 11 File History Backup Bug Affects Users After September Update

First seen 23 Sep 2026, 15:54 UTC • •
API

Article Content

Browse articles
ThreatCluster AI
ThreatCluster •September 23, 2026 at 16:54 UTC
  • •A bug in Windows 11's September 2026 update disrupts File History backups.
  • •Affected users may see incorrect error messages despite having functional drives.
  • •Microsoft is working on a fix but has not provided an estimated release date.

Microsoft has confirmed that a bug in the September 2026 update for Windows 11 has caused the File History feature to fail for many users. This issue affects both Windows 11 25H2 and 24H2 versions, preventing users from creating or updating backups. The problem was acknowledged on September 22, 2026, two weeks after the update was released on September 8, 2026. Users may see misleading messages such as 'Reconnect drive' or 'No version of the file available' even when their drives are functioning correctly. Microsoft has indicated that a fix is in development but has not provided a timeline for its release. The bug affects a wide range of users who rely on File History for backing up personal files and folders. The situation highlights ongoing issues with Windows updates that have led to multiple disruptions recently.

Start a free Starter trial for enhanced analysis

Ask AI about this cluster

Updated just now How this analysis works

Timeline

2026-09-08
September 2026 update released
Windows 11 update KB5124008 was rolled out, affecting versions 25H2 and 24H2.
Windowslatest
2026-09-22
Microsoft acknowledges File History bug
Microsoft confirmed that the September update caused issues with File History, preventing backups for many users.
Heise.De
2026-09-23
Reporting on the issue continues
Media outlets report on the ongoing File History backup issue, emphasizing its impact on users.
Windowslatest

More articles in this cluster (2)

Extracted Entities (3)

1 / 2