Strange question I just came up with. I am working on a system that had a corruption in the SAM file for the registry. The system would kick an error with lsass.exe stating that the passwords did not match. I was able to use the backups stored in the windows/repair folder to get the system running again. I then did a manual restore of the last restore point by copying the SAM, SYSTEM, SOFTWARE, SECURITY and DEFAULT files into the c:\windows\system32\config folder. Then the system came back with missing files. What I would like to know is, if I were to format and reinstall windows xp, then restore a backup of the program files folder, would I be able to restore the SOFTWARE file from the last system restore point to the c:\windows\system32\config folder and get all the old software running again without having to install them all?