If possible submit the Error Report once and look if there is a solution for it. You can also look if you have the most recent drivers for your graphics accelerator; I think this driver and the dwm.exe process are communicating all the time, even if you the Windows Classic theme. If that doesn’t work search the Microsoft Technet – Windows Vista IT Pro forums to see if there are more people with this problem. If you can’t find anything similar, you can post a new topic with all problem details; I expect that the Microsoft Technet Professionals can help you further.
Good luck!
