Problem with my PC's audio (Fixed!)

Whoops, wrong board
So I just got my computer back from being wiped, and I'm noticing a distinct lack of any sound. System sounds or otherwise.
Accessing the volume control makes the PC complain about having no audio mixer installed. Media Player complains of no sound device installed. As far as I know, the soundcard is in there, so I think it's just a matter of installing it. But, I don't know how to identify the card, how to install it, where to install it from or.. well anything..
Help?
So I just got my computer back from being wiped, and I'm noticing a distinct lack of any sound. System sounds or otherwise.
Accessing the volume control makes the PC complain about having no audio mixer installed. Media Player complains of no sound device installed. As far as I know, the soundcard is in there, so I think it's just a matter of installing it. But, I don't know how to identify the card, how to install it, where to install it from or.. well anything..
Help?