Home windows’ September replace breaks File Historical past. The repair is a rollback

In line with Microsoft, the problem is because of a bug that happens in all present variations of Home windows 10 and 11, together with 21H2, 22H2, 23H2, 24H2, 25H2, and 26H1. Microsoft wrote on this help web page and this one:

After putting in the September 2026 Home windows safety replace, some clients utilizing File Historical past, is perhaps unable to create or replace backups. File Historical past, obtainable by Management Panel > System and Safety > File Historical past, is used to again up information to an exterior drive or community location.

Affected gadgets may incorrectly show a “Reconnect your drive” message even when a appropriate backup drive is related and functioning correctly. Moreover, the “Final Backup” timestamp may not replace, and beforehand backed up information may present “No earlier model obtainable.” In some circumstances, Occasion Viewer may document utility crash occasions referencing FileHistory.exe and KERNELBASE.dll.

There’s presently no repair for the problem, although Microsoft says it’s “engaged on a decision” that’ll are available in a future Home windows replace. Till an official repair is launched, one of the best answer is to uninstall the safety replace, which you are able to do by rolling again a problematic Home windows replace.