Microsoft releases emergency patches for Windows authentication issues
The updates released for Windows in May have been incredibly problematic. The KB5013943 update has been causing various issues, one of which has forced Microsoft to push out emergency to fix things.
There are several out-of-band patches fixes available as the authentication issue they address affect various versions of Windows. In all, there are no fewer than eight patches available: KB5014986, KB5014987, KB5014990, KB5014991, KB5015013, KB5015018, KB5015019 and KB5015020.