Had similar probs, prviously had always installed a soundblaster card and ran the sound blaster driver disk,didn't bother with that as this new machine I built as it has a 5.1 sound card built into the motherboard,couldn't get a peep out of the buggah until I thought to run the CD that came with the motherboard,that had the drivers for the onboard sound on it,you may have to select which sound device you are going to use in Bios though.