^ good point really, but lets try and help him now that the 'damage' is done
Jaff87, I know XP is bad, but i've never heard it loosing the audio drivers just because it was unplugged.
Boot the computer, right click My Computer select properties and click the hardware tab then click device manager, your soundcard should be listed under the sound, video and game controllers tree. Expand the tree and make sure there are no yellow or red warnings on any of the devices.