Wait u have a core 2 duo and windows vista dx10, and a agp xpress card? that doesnt seem like a good design for a computer. well anyways ok i think ur problem is, either not enough RAM or i would try puttin 1 or 2 more fans inside. but hmm since this is a laptop i see...umm, hmmm....here go to this and download ur driver 945gm update, and if that doesnt work, sendit to GEEKSQUAD! its a crappy laptop lol, u gotta expect problems.