it happends on both windows xp32 bit and vista 64 bit my drivers are fine ive been messing with this for 2 days now. I just purchased this graphics card and i get amazing visuals but no sound and if i uninstall the drivers than what do you know my sound comes back into play i sat on the phone yesterday with evga for an hour they said my gpu is physically fine and its a driver issue and then we got disconnected. i tried to call back but they were closed for memorial day lol i know right he hung up on me to go home. If anyone has any suggestions please share them because i am so fruserated at this point i have tried almost everything nothing seems to work. Thanks everyone!!