I recently had to rebuild (clean start) my XP desk top. All fine, super fast start up etc., but no sound. I have done all the recommended checks, fix its et al, but somehow the sound card element of my motherboard has disappeared. Processor is an IntelG630 @ 2.7ghz with 4gig of ram. sound and video devices all appear to be in place but lots of yellow ? marks in 'other devices'. I am not prepared to pay to restore something that was already there and working just fine until I had to rebuld. Can anyone suggest how I can tweak the motherboard so that XP sp3 recognises it. Please help!