Originally posted by flavours
after running an everest report i believe the sound card is "Intel 82801AA I/O Controller Hub - AC'97 Audio Adapter" (does that sound like a sound card?)
that sound to me like onboard audio. have a look inside your pc and see if you have a soundcard.
it may also be that you do have a soundcard, and that in your sound properties the onboard is set to the default sound. the speakers do not work as they are plugged into the sc, and the sound is coming out of the onboard. try playing music, and then changing the speakers to the onboard, and see if you can hear the music.
if this is the case, you will need to follow HAVOC2k5 and timmer's instruction to disable ur onboard, and then set your sc to be the default playback and recording device.