Each of you that are having this problem, please post your DXDIAG in this post with your reply. This way we can have the engineer and myself take a look at this. The problem lies with some combination of hardware under XP Pro. We are trying to diagnose it, but this is not an easy one. As every system we have here it runs perfect on.
Here is the Link on how to get to the Dxdiag, then just attach it to the post when you are posting a reply.
http://forum.mtu.com/showthread.php?threadid=322