I fired up my back-up computer, which was still running Windows 10, just to update it and was almost immediately hit with a blue screen. I fought with the darn thing most of the afternoon trying to diagnose the problem, but most of that was wasted effort. Changed the power supply, tested memory, removed everything connected by USB (because Windows gave me an error message about removable drives). Nothing worked, so I gave up and tried to reinstall the operating system. Nope, didn’t like that, and wouldn’t boot up. Linux… no, not going there either.
I pulled the SSD and started over. It’s working fine now, albeit a little slow running on a mechanical disk. I can deal with that in a back up system.
For anyone interested, it was a Crucial BX100, 250GB model. I built that computer in 2015, so it lasted six years of fairly light duty.