And now it's constantly flashing on a black screen, then won't let me turn it off to reboot.
I knew I'd spoken too soon. I just knew it.
I've rung M$ help, and we'll see what they suggest.
This is not the laptop that I was worried about because it had an incompatible chipset, but the desktpop which was supposed to be just fine.
Some days, I really hate computers.