I ran a regedit program and a defrag in an attempt to speed up performance. Box ran fine until I shut down. On the start up of computer i get the following message: "Windows could not start because the following file is missing or corrupt: XP_PRO/SYSTEM32/CONFIG/SYSTEM". Now it won't load windows. I'm assuming I corrupted the register when I ran the edit program. I've read all the posts I can find on this site and have attempted to restart using the Recovery Console by restoring to a known good point. I was able to identify the last good RP, but when I type in: copy _registry_user_.default c:\windows\system32\config\default and hit enter it tells me it can't find the file. I'm running dual boot, both XP Home and XP Pro w/SP3. Any and all help will be greatly appreciated.