After reading this thread, there is no doubt that this is a serious Microsoft Bug. I am going to reboot and try to take a picture of the task halt so you can see it, but stop asking for a Clean boot. When this first happened to me on Friday, I fiddled around with it. I thought it was a Microsoft Edge problem because it causes Edge to not open, even though it is open in Task Manager with 14 instances. I completely wiped the M.2 SSD on Sunday morning, re-partition and all that, and reloaded Windows 10. I also let it install every update.
On Monday night, it returned. I tried a fix I found for what I thought was the Edge problem, and I thought it was fixed. However, this evening, after being shut off all day, the issue returned.
I fear this could become a widespread bug because the Microsoft folks in here do not appear to be taking it seriously.
I will return with a picture of the screen when I restart.