Sorry for ONE MORE thread on this sort of thing, but it's impossible to troubleshoot with Microsoft or even the internet.
I installed Deus Ex on the new computer (it's got Windows XP). I got through all the settings and everything, and then went to the training mission to see if it was all ok. I got about halfway through it, and then it just quit and Windows gave me a fatal error message (no blue screen, just a window). Tried again, and the same thing happened, this time when I went to START the training mission. So I uninstalled it.
Then, I figured I'd try a different game, so I tried to install Unreal Tourney. It got to about 95% and crashed. The computer rebooted itself, and told me there was a fatal error, do I want to send a report, blah blah. The program didn't show up on the Remove Programs list (obviously) so I deleted its folder. Tried installing again, and the exact same thing happened. This time, I tried opening up the program from its folder. It got through the splash screen, and went into its intro video. About five seconds into that, it quit and gave me an error message.
What could be happening here? I tried the compatability wizard with Unreal, and it hung on the Unreal splash screen.
Thanks AGAIN heh. Sorry I keep bugging you all with this stuff, but sadly we know more about computers than most of the people we know here.