|The sound adapter must be enabled in the bios Setup, if there is even a setting for that there.|
You must use the sound adapter software for your specific model.
The most common reason a sound adapter is not detected in Windows correctly or does not work correctly in Windows is you did not install the software for it the right way !
Sound and video "drivers" always have associated files that must be installed properly along with the actual drivers. If you install only the actual drivers, it's likely the device, and/or the other software associated with it, will NOT work properly.
Unless the instructions for installing a device tell you otherwise......
(this ALWAYS applies to sound adapter software.....) .
You DO NOT install drivers for a device while booting into Windows, if the software for the device has not been installed yet - when Windows detects a generic device or New Hardware while booting, you allow it to search for drivers, it doesn't find any, and it wants you to show it the location of the drivers - CANCEL that, continue on to the desktop, and install the software for the device using the proper installation from a CD or the proper installation file that you downloaded from the web.
The same applies no matter when Windows finds New Hardware !
(The following also applies if you want to re-install the sound software)
If you DID install drivers that way, go to Control Panel - Classic View - Programs and Features and Un-install the software you installed, reboot, DO NOT install drivers while booting.
If there was nothing to Un-install there, or on any case, look in Device Manager (reboot at least once first if there was something to Un-install there) , and if the sound device is still listed, RIGHT click on it and Un-install it (that may take a while).
If it was still listed in Device manager, reboot at least once after you have un-installed it.
DO NOT install drivers while booting, and then install the sound software the right way !
Continue on to the desktop screen, and install the software for the device using the proper installation from a CD or the proper installation file that you downloaded from the web.
Where is Device Manager in Vista and Windows 7 ?
Double click on the Computer icon, click on System properties in the top bar, Device Manager is on the left.