I've run some virus scanners and they haven't really found anything.
I'm wondering if my hard drive is messed up somehow. (Though my computer isn't more than a year old.)
There's a very slight dent on the heatsink, but I don't think my computer is overheating because it doesn't crash on CPU intense programs, just certain specific ones (like Teamspeak).
I also noticed that when I try to watch a DVD, the picture skips around a lot. Meaning it'll show 1 frame a second or something. The sound comes out perfectly fine, but the picture gets messed up.
I tried tinkering with the video card once. I tried pulling it straight out but that didn't work so I just pressed it back in and gave up.
I'm not sure what other information I can give but if anybody could help me, that'd be great.