I'm having an odd problem with my computer. When I attempt to right-click on any movie file(.avi, .mov, .wmv, etc) The screen goes black for 1/2 second or so , then redraws the screen before the menu comes up. I'm running an Athlon 64X2 4200+ with 1gb ram and a Geforce 6600 Gt, . I've had the same setup for awhile, but this problem is recent. I've tried upgrading the drivers, but doesn't seem to help. Any suggestions? Also, possibly related, WMV files already on my computer only play for about 2 seconds before the video stops. Pausing and playing again don't help. Any advice would be greatly appreciated.