Microsoft Confirms Windows 11 Security Update Install Issues

Microsoft confirms Windows 11 security update install issues

Microsoft has confirmed that the May 2026 Windows 11 security update (KB5089549) fails to install on some systems and triggers 0x800f0922 errors.

Windows boot partition runs out of space for Microsoft's May security update

Microsoft has admitted that the May 2026 security update might fail to install with a "Something didn't go as planned. Undoing changes" message. The problem is related to the EFI System Partition (ESP), which is usually where the device boots from. Its minimum size is 200 MB, and the operating system manages it. However, if there is 10 MB or less free space, then the update might fail with a 0x800f0922 error code and the helpful message. "On aff…

Microsoft acknowledges May 2026 Windows 11 security update install problems

Another month, another update for Windows which is problematic. This time around, it is the May 2026 Windows 11 security update – or the KB5089549 update. The good news is that the problem is not too widespread, but that will come as cold comfort for anyone who has been affected. The problem sees installation of the update failing with a 0x800f0922 error. Microsoft has confirmed the issue in a support document predictably entitled May 2026 secur…

KB5089549: Microsoft just made it easier to install the mandatory crucial Windows 11 updates

KB5089549 introduces a new change that simplifies the update for the mandatory critical security update on Windows 11. Read more...