If you bought your computer as a complete system from a "brand name" company (Dell, Gateway, eMachines, Acer, etc.), go to the support area of their website; punch in the model number and look for any drivers for onboard/integrated components.
If you built your system yourself, or bought a 'custom' machine from a smaller computer store, find out the manufacturer and model number of your motherboard and goto their support area and find any drivers that are applicable for the model that you have.
You'll more than likely need to install a Realtek AC97 audio driver since that's the most common onboard sound card. I'd recommend using the ones that the manufacturer has listed on their website, since they've certified them to work with their hardware. Newer/older ones that you find on the first couple pages of a Google search may or may not work.
If you're having too much trouble tracking anything down, post your computer's Make/Model or any names/numbers found on motherboard box that may have come with a custom built machine. I don't mind doing a quick search for you if you've exhausted your resources.
Offtopic: Third time writing this post. I've got an IBM Thinkpad T40 that has a
page back/forward button just about the left/right arrows on the bottom right of the keyboard. Does anyone know a non-hacky way of "unbinding" these keys so that they no longer work in IE6/7. I don't use them for anything else, and I'm pretty close to just throwing those two keys in the garbage. (fat fingers...)
