Microsoft admits it broke Windows 11 backup feature in September update — here’s how to fix it (but you might want to hold off)

September 29, 2026

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A bug in Windows 11’s September update broke File History
Microsoft admitted the backup feature was scuppered and has apparently now fixed it
However, the cure is in an optional update, so it might be best to wait for the full release of the upgrade next month

Microsoft has admitted that Windows 11 has a bug that messes up a backup feature in the OS, although a new optional update fixes it (but not quite fully).

Windows Latest reports what’s been a slightly odd tale in that the bug in File History has been kicking about since the September update first emerged over two weeks ago, but Microsoft didn’t acknowledge it — even though it was a widely reported issue.

File History is a feature that enables you to keep files backed up to an external drive, and while it doesn’t see a whole lot of use these days, it’s obviously important for those who do still avail themselves of the functionality.

Analysis: update skeptics

(Image credit: Mark Pickavance)

At least File History appears to be cured of this latest feature-breaking bug, and hopefully the other problem highlighted on Reddit will be fixed before too long.

You don’t necessarily want to download an optional update, of course, as it may bring in other bugs — after all, it’s still a beta. The safest bet is to wait for the October update to arrive in two and a half weeks (on October 13) and then install that as the remedy for your File History blues (while temporarily keeping backups a different way, manually or on OneDrive, in the meantime).

Windows 11 bugs have remained a problem throughout 2026, and every year before for that matter (particularly with the 24H2 release). Microsoft still needs to do better in this regard considering this is one of the thornier issues that has continually dogged its OS, which it’s busy fixing this year.

The trouble with the long-running overly buggy nature of Windows 11 is that it’s making some users hold off updating the OS, and I don’t mean for just a week or two. (I’d advise a week’s breathing room in general myself, just to see if there are any major bugs or nasty showstoppers with any given update).

For example, this Redditor notes: “I am once again advising everyone to disable Windows updates. Let people test the bugs for a few months, then update. Your PC isn’t gonna implode because you are 3 months behind on Windows 11 versions.”

This was in reply to a comment which simply asked: “Is there a Windows 11 core feature that hasn’t been broken at least twice since release?”

Cynicism prevails around Windows 11 updates in many corners of the web these days, and I think this is something Microsoft needs to act on. Yes, Windows is a very complex operating system that needs to cope with umpteen PC and device configurations, and a labyrinth of legacy features that must be maintained for a niche set of customers, but still — that’s ultimately not an excuse.

Something needs to be done to improve QA and testing, otherwise it’s going to be difficult to declare that ‘Windows 11 is fixed’ next year, which is Microsoft’s goal (presumably).

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