First...find the drivers CD which came with the system. If unable to find such, then go to the website of the system manufacturer and download the appropriate audio drivers listed for your system there.
Start/Run...type devmgmt.msc and hit Enter or OK.
Scroll down to Sound, Video, Game Controllers, click on plus sign.
Various audio items will be reflected. Depending on your system, there should be something indicating "AC 97" or "audio controller" or "High Definition/HD". That item should be your sound controller, which is installed when you install the audio drivers.
Right-click on it and click the Uninstall option. You should get a warning, click OK.
Reboot the system and install the audio drivers (after desktop settles) by double-clicking the audio drivers file previously downloaded from the website of your system manufacturer...or running your drivers CD which came with the system.http://www.ehow.com/how_5533384_uninstall-audio-drivers.html
If you have questions, please ask.
I imagine that you know how to uninstall a program, using Add/Remove Programs in Control Panel.
Edited by hamluis, 25 November 2009 - 12:11 PM.