Originally posted by: rbV5
It could be a bug we're seeing in Catalyst 4.10.
Open up your file in WMP (make sure you are in overlay mode Tools>Options>Performance>Advanced<make sure "use overlays" is checked>
then Open up Catalyst Control Center (if you're using it) and in advanced view, go to Video>Overlay settings, adjust the overlay settings with the video playing, we've got reports of Saturation and contrast levels are at zero after the Catalyst install.
Its not noticed by folks not using overlay (VMR modes) so it doesn't affect everyone.
Hope thats your issue.