i install the drivers for my video card. but some reason the videos wont play. when i try to play a video the program just crashs. videos wont even play in the internet. my videogames work and flash videos work too. but quicktime,windows media player or divx wont work. did i install the wrong drivers for my video card? i have a geforce 6600 gt video card. what drivers am i suppose to download from site?