The first thing to do is right click "computer" got to "manage" and got to "device manager"
See what driver you have. Windows may not have a compatible driver for you.
I don't know if that's Realtek or not but here is their site for drivers. Latest Realtek HD Audio Driver Version
If not just try going to your manufacturer site and get the latest driver for your sound device.
Hope this helps somewhat....Good luck. That's about all I know about sound. haha.