Black Screen with cursor

I'm Running Windows 10.

I've been struggling for 2 weeks with a Windows update causing a black screen with a moving cursor. The Update is either KB5016616, which is a cumulative update for 21H2. Or it might be KB5016592, says it's an update preview for .Net Framework 3.5 and 4.8.

I have made sure that all Dell drivers are up to date and checked with Intel to see if there were any options there, but I couldn't find anything.

Any ideas would be greatly appreciated.