I have just updated my video drivers from 169.25 to 178.24, and since then watch avi's in WMP have caused the screen to go green and blocky. The only way to fix it is to stop the video, and then start it again. But you hav eto skip the few seconds that cause the blocking to happen.
I am going to roll back to the more reliable 169.25, but I'm curious if anyone else has had this problem also?
System: Vista Business x64, 4GB Ram, 7600GT