I have a Sony Vaio with a partitioned Drive: C & D. It came that way. It's been a constant problem. The C partition keeps running out of space. So I purchased Partition Magic and a year ago successfully took space from the D partition to use in the C partition. Yesterday I had to do the same thing. However, after it made the change or at least I think it did, because I didn't sit there and watch. When I came back it seemed to have finished and I rebooted. I got a message that said "Missing Operating System". I rebooted with my Windows XP Pro CD to see if it would bring everything back. It said "Press any key to boot from the CD". It went through the Intel logo screen, then a blue screen with "Windows Setup" in the upper left and in the middle of the screen "The file pci.sys is corrupted. Press any key to continue." I pressed a key and it started the same process over again with the same error message. I can't access anything, can't reboot and I don't have any other emergency boot disk. I thought about removing the drive and sticking it in my wife's other matching Vaio desktop, formatting it and using it as a secondary drive, buying a new drive to stick in my Vaio and try reinstalling Windows to it. Can anyone help me on this or is getting a new drive my only alternative at this point?