Microsoft says the February 13 security update for Windows 11 may "face installation issues."
Make Windows 11 security better
Installation can get as far as 96 percent, but for some unlucky Windows 11 customers, a message appears: "Something didn't go as planned. Don't worry – undo changes. Please keep your computer on."
Complaints about installation issues have been rumbling since the release of patch KB5034765, and last night Microsoft finally acknowledged via its Windows Release Health dashboard that there is a problem.
Windows 11 23H2 and 22H2 are affected, although Microsoft has yet to detail exactly what might have gone wrong. The current solution is to delete the hidden folder C:/$WinREAgent, possibly reboot and then try the update again. According to Microsoft: "After following these steps, installation of the February 2024 security update should be successful."