hi. i am a newbie and a recent newly wed. my wife has a IBM ThinkCentre A50P PC. It had soo many problems that I installed a fresh new copy of XP on it. After installation the the sound didnt work. I trouble shooted and was lead to Device Manager where I saw YELLOW EXCLAMATION MARKS under the heading other device: 1) Audio Controller 2)Video Controller 3)Ethernet 4)PCI... something I went to the IBM driver download site and updated the audio driver. GOT SOUND. I also downloaded the video, and ethernet updates, but NO CIGAR. It didnt work. I dont know if I downloaded the right drivers. Can someone point me in the right direction? Also what is the PCI....? P.S. I called IBM but they couldnt help. I was reading about a BIO update, would that help? Once again IBM Centre A50 (currently now connected to internet, but my own PC works I cant download the drivers).