Atikmdag Problem, the unsolved case.

I heard that many of you keep itching your heads because of this problem; so am I. I've been having this kind of problem since I installed Vista. I like Vista very much, but it brings so much problems to me than XP. Ok, let's start with the issue. I often play Age of Empires III and in every 5 minutes it hangs for a short period of time. It hangs 2-3 times and the next thing that will happen is either it will show a black screen or hangs. Windows never responds if either of these happen, so I shut down the computer improperly. Is there really a solution for this kind of problem?

Additional info:
I accidentally installed a Nvidia driver when I'm finished installing Vista. Does this have anything to do with the problem?

Thanks in advance!
-amochang