Hi GigaDude,
I too had this problem and as stoneys-nutz has suggested, there are plenty of theories and "suggested" solutions on how to solve this problem. Do a Google search on this and you'll come up with hundreds of threads/posts. This error is prevelent with both ATI and Nvidia under Vista.
One of my many posts about this problem here -
The Display driver has stopped working - The Saga
For "me", the problem went away when I replaced my "faulty" video card.
Bottom line is there is no one hard fix solution for this error
Good luck.