Microsoft warns that KB5013943 update is causing authentication failures in Windows 11, Windows Server and more
Following the release of this month's Patch Tuesday updates, Microsoft has issued a warning that installing the KB5013943 update can lead to authentication issues for various Windows services.
The update was released on May 10, and was meant to -- among other things -- fix an issue with screen flicker in Safe Mode. But in addition to causing error messages for some users, the KB5013943 update has also led to authentication failures Windows domain controllers.
KB5013943 update for Windows 11 is causing 0xc0000135 errors
While each Patch Tuesday sees Microsoft fixing various problems with Windows 11, the following days see the negative fallout. We've become used to the updates that Microsoft releases having unwanted side, and this month's KB5013943 update is a prime example.
With echoes of a previous update fiasco that caused endless problems with printing, Microsoft intended the KB5013943 update to fix an issue with .NET Framework 3.5 apps introduced by another update. But rather than fixing the problem, installing the KB5013943 update seems to have made things worse for some users.