I tried to install AVG anti-virus the other day as I had noticed the computer starting to do some unusual things such as throw pops at me on the Net and redirect me etc. It came up with an error during the AVG install and I had to reboot. Upon rebooting it came up Windows XP was unable to start because the following file is missing or corrupted C:/windows/system32/config/system. I tried booting into safemode but got the same error. I booted off the XP CD and tried to do a repair of the existing installation but that also failed (tried 4 times) after the first try it rebooted after copying setup files and came up with a different error - Windows XP was unable to start because the following file is missing or corrupted C:/windows/system32/cp_437.nls. Since than I have tried using recovery console and using the following commands - fixboot c: & chkdsk \rbut with no luck. I have taken the drive out an scanned it over a reliable spyware & virus scanner which found no bugs or errors. IS there anything else I can try before performing a complete format as I want to avoid this if possible. I don't think it is a HDD issue as the drive and all its contents came up fine though a external USB enclosure. Any help would be greatly appreciated.