A while ago, I got a new hard drive. 80 gb, w00ts aplenty. I installed Windows on it and used it as my primary from then on. Problem is that it didn't have any of my software configurations on it, so I ended up copying my old Windows directory into the new one. BIG MISTAKE. There was an ActiveX haywire of some sort, and installing XP over it didn't help much.
So I installed a new XP on my old, now empty primary, and things, for the most part, are working pretty well. Problem is that, with quite a few games, my computer works fine for a while, and then after about 30-60 minutes (there's an exact number, I think, but I haven't bothered finding it out), it hangs without any kind of preamble or warning. I don't mean that the game hangs, I mean that my entire damn computer hangs and it has to be force-restarted. I've tried reinstalling DirectX, which hasn't changed matters.
So far, the games which cause this are, but are not limited to:
Fallout 2
Might and Magic 6
Warcraft 3
Since these games really only have the fact that they're all full-screen in common, I'm kinda stumped as to why they all crash. (It's not all full-screen games, either: Call to Power works just fine for hours on end, and Europa Universalis II hasn't had any problems I've noticed.) Any suggestions?
EDIT/NOTE: Say 'Get a mac' and I'll punt you in the penis.