I have a pretty high end Dell Inspiron 9100 w/ an ATI Mobility Radeon 9700. Problem is my computer locks up when I play Command & Conquer: Generals and Doom3. No warning messages, just freezes. I have the latest drivers Dell has to offer, DirectX 9.0c, all the game patches, but nothing seems to be helping. Is it driver problems or could it be something else? Any possible solutions?