I recently had to wipe my hard drive and reinstall Windows XP on my Emachines W4685 which I had rebuilt, and had a new ASRock P4vm800 motherboard put in. Everything was going well when I noticed that there was no sound. I went to the Emachines website and downloaded the recommended driver by the company Realtek AC'97 Audio Driver, but there is still no sound..........does anyone know how to remedy this problem?

Get the driver from ASRock.

You should have a CD with driver's that was with the new motherboard. It should take care of your sound.