I've done a little research on my issue. When my system crashes I get the LiveKernelEvent error, which suggests that the problem is either a graphics hardware problem or software issue. However, I have found out that many people are having this same issue laptop and pc, no matter the manufacturer. It doesn't matter if your graphics card is Nvidia or ATI.
No one knows the exact cause of the error. Some believe it's a faulty motherboard, power supply, bad memory, the graphics card itself, or the drivers. If you google the error you'll see that many people have replaced items in their pc and laptops and still have the same problem. The only common denominator I've seen is Vista.
The crashing happens on WoW, Call of Duty, City of Heroes and just about any other game. So just to give you a heads up.