My first computer project. I put together a Asus P5B mobo (Intel 2.13 mz), with a 250mb sata hard drive and a ge force7600 video card.(WinXP prof )After a few misatkes I got it working fine. The problem remains that I have no sound. I tried using the asus install cd with no luck. I checked my wiring 2 or 3 times so far.A few error messages when trying to update the audio driver (which is not installed) is 'HDA Auto bus driver is required and not found' and usbehci.sys is also missing in action. Ive tried updating the driver in control panel system and a found cant be found. Any clues would be appreciated. PaulO