Time to show it the instruments
"I have an oscilloscope, and the probes are co-o-o-o-old..." I usually start with that warning to cajole my techy things back to some semblance of proper behavior; and normally it is successful.
Not this morning. Not only did it crash, it refused to boot or POST. I woke up to find it totally dark (as it should be) but my mouse glowing faintly green. It gave the usual low "waking" beep, then nothing. Watched it while I ate my entire breakfast and still no signs of life; had to power cycle, whereupon it booted normally.
Hmmmmmm...
SFC & DISM both say file integrity is 100%. So
... Guess I need to do some memtest abuse and progress from there.
So... what does this machine have in common with my old one that was behaving the same way...? Video card; migrated to new system. Same AMD Adrenalin video drivers. Same model power supply. Windoze 10. Everything else is different.
Except, of course, same (l)user. This will, I have no doubt, eventually turn out to be at least partly a PEBKAC error.
mnem