Several hours later. Am looking at the screen. The cursor is frozen, the folding window is all grayed out, and the EVGA temp gauge says, "O" (zero) degrees. This some time after blowing out the dust in the case.
Rebooted, ran Windows 7 updates and it's running again. How long will it last? Who knows? I'll be gone. Maybe some connector is loose. Who knows what a cat will do? I think the cat's to blame.