Nothing will appear under Sound, Video, Game Controllers...other than maybe a few legacy items...until you install the audio drivers. At that time, an audio controller should appear under SVG.
What is reflected in Device Manager now...has nothing to do with installing the drivers, typically. The drivers should install by just double-clicking the downloaded package, if it's an .exe file.
Before attempting install, you may want to do this, Remove Unused Drivers and Devices - http://www.windowsnetworking.com/kbase/Win...andDevices.html
I would try the Realtek package first.
Edited by hamluis, 25 August 2010 - 05:23 PM.