Thanks for the suggestions.
I tried that for awhile, and tried to get it to crash, but it didn't. The problem is so sporadic, though, that there was no guarantee that it was actually solved, only not showing. Also, it was running terribly slow and choking on every action.
I did try loading...
Before the holiday I bought myself some new hardware and set it up, and ever since then I've been trying to achieve stability.
My setup is:
Intel Core 2 Quad Q9550 @ 2.8GHz
Asus P5Q Pro
G.Skill 2x2048MB DDR2 1066MHz F2-8500CL5D-4GBPK
MSI GeForce GTX 260
Antec TPQ-850 850W ATX12V / EPS12V...