Just completed upgrade from windows nt4.0 to windows 2003 one pdc which upgraded domain to windows 2003. All servers and workstations able to log in to new environment but one windows 2000 server which is sql server had corrupted file in c:\winnt\system32\config and so wouldn't load operating system. I installed another instance of windows 2000 on d drive and was able to get in no problem and then installed veritas backup exec 9.0 so i can restore from tape. What i did was to start by restoring entire config folder and was able to get in to original windows 2000 but got lots of messages of installing new hardware such as nic card and scsi which obviously had already been installed but must have lost more settings. My question is should i just restore the entire c drive from tape from day before or are there specific system folders that i should do first such as system volume folder and winnt. Also, i was attempting to restore system state but gave message about domain controller but this server is not domain controller. I didn't know where to target the system state restore coz i don't know if it resides in a specific folder or is just part of c drive. This is production server so really need help on this. Thanks.