Okay, so this morning, my audio just stopped working.  For no apparent reason.  My friend was on the computer but she's fairly computer savvy so I don't think she would "accidentally uninstall a driver" or something.    
It just stopped loading all together.  I tried different speakers and different headsets and none of them work, and tried same headset on a different computer and a different radio and they worked, so I'm firmly convinced it's a computer/driver problem.  I uninstalled the Realtek AC'97 driver.  Whenever I tried to reinstall, it "lagged" and got stuck at about 80%.  At this point, I have no clue what to do.  Download an older version of the driver and try, maybe?
If you need to know any more information, just ask.  A computer is half-useless to me if I can't hear audio, so this is a pretty big problem :/
I'm using Windows Vista... and Vista Manager says this about my audio stuff:
Sound Card High Definition Audio Device
Manufacturer: Microsoft
DeviceID: HDAUDIO\FUNC_01&VEN_10EC&DEV_0883&SUBSYS_10192932&REV_1000\4&7EEC690&0&0001
Status: OK