windows media player at wmv. in wrong color

for some reason all wmv.'s played on windows media player
seem to be in inverted color... or highlighted and not the
same.
i didnt noticed till today and my only guess is its
something to do with the driver update and when i left a
cd in the drive and everything went smaller and wrong
colored. it was fixed after a reinstallment and restart...
what is wrong with my media player at playing wmv.'s? it
plays visualiazations in the full range and right
colors... just wmvs its messed up at.