At the end of the installation, it said system was not altered. Don't know if that's how it's supposed to be. But I checked what driver was being used, and it's the 177.92.

Anyway, it hasn't helped any, and I just noticed the light on the GTX280 changes from green to orange/red when it crashes. I guess that means that it's something wrong with it/it's drivers still. I'll contact the company that built it tomorrow, and hear with them. Kind of seems like a hardware problem. Thanks for your help Kemical.