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Windows 11 File History not working? If it asks you to “Reconnect your drive” when your backup destination is already available, check Windows before assuming the drive needs replacing.
Microsoft’s optional updates released on 22 September 2026 address a File History fault affecting backups and restores to external drives and network locations. The misleading message can appear even with a compatible, functioning destination.
Checked on 28 September 2026. This article covers that specific fix. It does not mean every backup failure has the same cause.
Windows 11 File History not working: which update contains the fix?
- Windows 11 24H2: KB5124010, OS build 26100.9550.
- Windows 11 25H2: KB5124010, OS build 26200.9550.
- Windows 11 26H1: KB5124006, OS build 28000.3086.
These are optional, non-security preview releases. Read Microsoft’s KB5124010 release notes for 24H2 and 25H2 or KB5124006 release notes for 26H1 before deciding whether to install. Later cumulative updates may include the correction, so you should not force an older preview onto a newer installation.
Check the Windows version before replacing the backup drive
Press Windows + R, type winver and press Enter. Note the version and OS build. Then open Settings → Windows Update → Update history to see what was installed recently.
Record the exact File History message and when it started. Also check whether the destination is visible in File Explorer. For network backups, confirm that the correct network location is reachable and that you still have access to it.
A visible drive is not a full health test. Cable faults, a disconnected network share, insufficient space and failing storage still need consideration. If the drive makes unusual mechanical noises or repeatedly disconnects, stop repeated backup attempts and have it assessed.
Should you install the optional preview update?
It can be worth considering the matching update when your symptoms fit and you need the fix now. Use Windows Update and follow the current Microsoft release notes for your version. If the update is not offered, do not download a random driver pack or install a package intended for a different Windows version.
On a managed work computer, speak to your IT administrator first. Review known issues and keep a separate copy of important files where possible before changing the system. If everything is working, this article is not a reason to install a preview unnecessarily.
Test a backup and a restore afterwards
Our practical recommendation is to check the complete process, not just whether the warning has disappeared:
- Confirm the destination. Make sure File History points to the intended external drive or network location.
- Create a harmless test document in a folder already included in File History. Avoid using your only copy of an important file.
- Run a backup and check that File History records a successful recent run.
- Find the test file in File History and restore it to a different location, so the original remains intact.
- Open the restored copy. Check that its contents match what you expected.
One successful test is useful evidence, but it does not prove every historic file is recoverable. Keep checking that backups continue to run. Do not format the destination or delete existing backup versions simply to clear an error.
Separate issue: USB audio Code 10 is still listed
As of 28 September, both release notes still list a problem affecting some USB Audio Class 1.0 devices after September’s security update. Symptoms include Code 10 in Device Manager or missing audio. Microsoft has not marked this issue resolved in these notes.
That does not apply to every headset or every sound fault. Check update history, identify the accessory and test it on another computer before deciding it needs replacing. The File History fix should not be presented as a fix for this separate audio problem. We do not recommend removing security updates or disabling security protections as a general workaround.
Help with Windows and backup problems in Stockport
If you are unsure whether Windows, the connection or the storage is responsible, AC Computer Warehouse can assess the fault. Tell us the Windows version, the exact message and whether your important files exist anywhere else.
See our computer and laptop repair services or business IT repair options. If files are already inaccessible, ask about data recovery assessment; recovery is not guaranteed.
Ask us about your backup problem or call 0161 282 2548. Our workshop is at Unit 13 Kingston Mill, Chestergate, Stockport, SK3 0AL, with free parking outside.
Frequently asked questions
Does “Reconnect your drive” mean my backup drive is broken?
No. A Windows fault can produce a misleading message, but connection and storage problems can also interrupt backups. Check the Windows version and have the destination assessed before replacing or formatting it.
Will the update recover files that were never backed up?
Do not assume so. Repairing a backup function cannot recreate a backup that was never made. Check which versions are actually available and test a restore without overwriting your working files.
Do I need both update packages?
No. Use the release that matches your Windows version, or a suitable later cumulative update. The 26H1 package is not an alternative package for a 24H2 or 25H2 installation.