Argh, don't talk to me about overheating. My graphics card does that, and causes my computer to freeze when I do anything remotely taxing with it (like playing 5 minutes of a 3D game, or randomly during Minecraft). At least, I think that's the cause. At this point, I'm not going to bother getting another replacement for it (I already replaced it once), and instead just get a new computer. I've had this one for nearly 5 years now, so that's good enough.
I really need to read some more of the stacks of books I have lying around. I also have stacks of games to play, but I don't trust my computer to be able to do so - I don't know whether I'm just not much into gaming, or whether it's just that I'm unable to play.