Thanks for all of the great info, guys.
Somehow, I got the thing running again. I tried a lot of things and I don't know which one of them provided the fix....but I'm sure, it's a temporary one. At one point, it wouldn't even go into the BIOS at boot up or into safe mode. Kept locking up, kept reinstalling Windows, lost all of my programs, no desktop, all sorts of crazy stuff. I suspect it's a combination of things. Just an old computer.
I realize that I'm going to have to bite the bullet and upgrade. I prefer to build my own machine, which is what I've done for my last seven machines. But I'm not looking forward to having to buy all new components with the exception of the hard drives. Haven't done research on motherboards in years, so I don't really know what's out there.
Anyway, I've gotten pretty good at re-installing XP and installing all of the drivers. A lot of practice.
Any recommendations on a good motherboard, processor and video card?
Thanks again.