NooNoo,
Hello....
I've been reading the threads you posted for a guy nicknamed jatt about the problems he had with multimedia audio devices... well, I have the same kinda problem.
When viewing Device Manager it shows:
The drivers for this device are not installed (Code 28).
The Everest Report for my PC shows this for Multimedia:

Intel 82801DB(M) ICH4(-M) - AC'97 Audio Controller [A-1] PCI

I used to have windows 2000, and Updated to Win XP, and I used to install Genius' Sound Maker 32X2 driver, and that used to take care of the problem, but that CD doesn't contain drivers for XP, so I downloaded the drivers for XP, installed'em, but I still get no sound through my speakers, and Have the same DEvice manager error: The drivers for this device are not installed (Code 28).

Noo Noo. Could you please Help me, I have No idea what to do...