When I try to watch a video computer crashes and flashes a black screen. The computer runs very slow and eventually if the media player isnt closed it will crash and restart. I had this graphics card in another computer and had no problem. Playing games and streaming videos works fine. Im using windows xp sp2 im using a geforce 6600 a gig of dual channel ram 2x 512. I have tried using windows media player, winamp, SLC player, divx, and nero media player. All arent working. If any one has any ideas please let me know.