I've had a good luck thro' the board for te same problem and even thro' a few people seem to have the same thing happening, there hasn't been a real solution posted. I used to have no problem making WMP 9 going to full screen now if I click on it, it just flashes up to full screen for 1 second then goes back to normal size. This is really annoying as a lot of the DivX movies I D/L will only play properly in WMP.Also The Theater mode in Kazaa is doing the same. Please help. Thank You. Lee.