My old XP always had some problems. So I deceided to install a new one. during the installation, the computer got some errors and stuck, basically error messge showed that some DLL file missing. Then I couldn't exit from the installation, had to turned the computer down. and after restart, it seemed that my old system is gone and new XP can't installed. What should I do to get my old system back or install a new one? Does that mean all my files gone? SOS..Thanks a million.