Did you try the link I posted above? If you dont have the restore disk ask a friend if they have a motherboard drivers disk, the one that comes with the motherboard or computer. If they do put it in and go to device manager. Find the "!" on the device, sound, and click reinstall driver. With the disk in it should take. Restart the computer and you should have sound. If that does not work get a sound card, only about $20.00 and you'll have sound. Being a gammer I did not know there was a big difference between onboard sound and a card. There is a huge difference. I think the sound card is much better.