ok i just reformated my hard drive, i did not back up any files. everything seems to work ok except my sound. When I go to add hardware like the troubleshooter says it say Multimedia Audio Controller with a little question mark next to it. it says no were what kind of audio card i have. then when it tells me to check and make sure my volume is not muted i click Allprograms>Assesories>Enterrainment>VolumeControl, it says i have no mixer devices installed. i have tried install ing a lot of stuff nothing seems to be working. it is a built-card on a Shuttle XpC. IF you have any idea please give it to me this is really annoying. Thnx, Lefty!