Max 2022 Won't Close or Change Render Engine

[RobH2]

I have the strangest anomaly. I was using Max 2022 on Sunday and my machine froze. I had to do a hard restart. 

Now Max 2022 freezes when I try to Exit it with either the dropdown or the 'x' in the upper right corner and I have to Task Manager 'End Task' to quit. I also can't change render engines or Max freezes the same way. 

I've deleted my ENU and have a new one, no help. Thinking it might be the OS, I restored an Image from two days prior to the crash and that doesn't help. 

To make it stranger, Max 2021 is exhibiting the same problems and I haven't use it in weeks. Max 2020 is fine and is acting just like normal. 

I can figure out what would kind of a crash would affect Max 2022 and Max 2021 both, even when Max 2021 wasn't even being used. I'm thinking of reinstalling Max 2022 but since Max 2021 has the same problem, I'm wondering of all that effort will even do anything. 

Anyone else ever seen this issue?

[RobH2]

I'm going to respond to my own question as I didn't have time to wait to see if anyone had suffered something similar and had a fix. I don't have a fix, I just reinstalled Max. I used my workflow (that coincidentally I have posted here on the forum for another user) and it only took me about 1.5 hours to get back up and running. 

This was an odd one. It was catastrophic. I install Max on a separate M.2 drive from my OS. But, my ENU does live on the OS so I initially was confident that rebuilding the ENU would solve it. After all, I've suggested that 100's of time to users here. But no go. Then, I was sure that restoring my complete OS from a saved "Image" would certainly fix it, but no. 

So, whatever corrupted, was in the Max installation on my separate drive. No other failures occurred on that drive and the drive checks out perfectly. Only reinstalling Max solved it and now I'm up and running.