Have had this problem for a few days now.
Windows would not start : windows\system32\DRIVERS\pci.sys file missing or corrupt.
I have reformated and reinstalled XP PRO SP1 but the error is STILL there.
yes I can start in safe mode and if I put the cd in the drive windows will start without a problem.
I was wondering if this was a HARDWARE issue now (fried hard drive or memory stick etc.)
I should let you know that thanks to the wonderful weather in britain we had a lightning storm the other day and our electricity went off. could this have damaged my computer??
Thanks in advance for any help or insight you can offer.