GoKawiilMicrosoft ships preview patch for File History bug in September Windows update
Microsoft confirmed that its September 8 Patch Tuesday update broke File History backups on Windows 11 (23H2 through 26H1) and Windows 10 ESU devices, causing errors like false 'reconnect drive' prompts and missing previous file versions. The company has released an optional preview update to fix the issue, though it currently does not apply to Windows 11 23H2 or Windows 10.
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Backup tools like File History are relied on by users to recover lost or corrupted files, so a bug that silently breaks this feature could leave people without working backups without realizing it. The partial rollout of the fix suggests Microsoft is still working through compatibility across its various supported Windows versions, meaning some affected users may need to wait longer for a resolution.
- September's Patch Tuesday update broke File History on multiple Windows 11 versions and Windows 10 ESU.
- Microsoft has issued an optional preview update to fix the bug, but it doesn't cover Windows 11 23H2 or Windows 10.
- Users can check Windows Event Viewer for FileHistory.exe or KERNELBASE.dll errors to confirm they're affected.
WD My Passport External Hard Drive — Since File History depends on a reliable connected drive to back up your files, having a solid external drive on hand is essential. The WD My Passport is a compact, portable option that works well with Windows backup tools, making it a practical companion while you sort out this File History bug.
See WD My Passport External Hard Drive on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: zdnet.com — Lance Whitney, 2026-09-23
Published there as: “How to fix your Windows File History if the September update broke it”
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