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Known update issues

Windows 11/10 ESU: File History shows false 'Reconnect your drive' after 8 Sep 2026 update

WorkaroundKnown issueCommunity report

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Community report – not yet confirmed by the vendor: users or trade media report on it (forums, Q&A sites, Reddit, web research), but the vendor has not confirmed the issue (yet). Use this information with caution.

Summary

File History is reported to show a false 'Reconnect your drive' message after the 8 Sep 2026 update, and backups stop working. This is reported by users, not yet confirmed by the vendor. A fix is reported to be available with KB5124010, but one report says part of the problem persists.

Symptoms

  • File History backups fail.
  • Restores fail with 'no previous versions'.
  • The last-backup timestamp is missing.
  • The message 'Reconnect your drive' appears although the drive is connected.

Affected

  • Windows 11 23H2, 24H2, 25H2 and 26H1
  • Windows 10 with Extended Security Updates (ESU)
  • Systems with the 8 Sep 2026 update installed
  • Exact builds and KB numbers of the faulty update are not confirmed by the vendor

Workaround

  1. Install KB5124010, which community reports describe as a fix.
  2. Alternatively, some reports describe uninstalling the September update (rollback). Check the impact on security before doing so.

Note: One poster reports that the missing last-backup timestamp persists after KB5124010.

Fix

No vendor confirmation yet. Community reports name KB5124010 as the fix.

Recommendation

Check whether File History is in use on your clients. If so, test KB5124010 on a pilot device and verify that backups and restores work. Do not rely on File History alone; make sure a second backup exists. Wait for the vendor's official statement before wide rollback of security updates.

Reports from the community and trade media

Reports from forums, Q&A sites, Reddit and trade media – linked only, without the names of the authors; the vendor’s statement is authoritative.

Sources

Compiled from community reports and web research and translated with AI (Claude) – not yet confirmed by the vendor. The vendor’s statements are authoritative. Updated 1 Nov 2026, 17:05.

Where the information comes from

We continuously read the vendors’ official sources, community reports and trade media and summarise them in our own words, with a link to the source:

  • Microsoft: Windows release health (Windows 10/11, Server 2016 to 2025), Windows message center, known issues of Microsoft 365 Apps (Outlook, Excel, Word, PowerPoint), Edge, Intune, Autopilot, Windows 365 and Entra Connect, Microsoft KB articles with timelines, Exchange and Windows IT Pro blogs, optionally Microsoft 365 service health and message center
  • other vendors: Veeam KB, Citrix (known issues), Ubuntu and Debian (regressions), Broadcom (VMware), Fortinet, Cisco, Mozilla, Let’s Encrypt
  • community (title, short excerpt and link only, without the names of the authors): Microsoft Q&A, Microsoft Tech Community (discussions), Veeam R&D Forums, Eleven Forum
  • targeted web research with AI (Claude), e.g. on the updates of the month – this also finds discussions on Reddit and in forums; such entries are labelled as community reports until the vendor confirms them
  • early warning from trade media (title and link only): Born’s Tech and Windows World, BleepingComputer, AskWoody, Windows Latest, Windows Central, gHacks, The Windows Club, Deskmodder, Dr. Windows, WindowsArea, Frankys Web, heise online

Summary and translation with AI (Claude by Anthropic) – without any data of visitors.

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