\WINDOWS\SYSTEM32\CONFIG\SYSTEM MISSING or corrupt - My computer won't start up I don't have a setup disk what can I do? I do have access to another computer can I make a setup disk? I'm running XP media.

GarySince you don't have Windows CD, repairing your problem depends, if you have Recovery Console installed on your computer.
To check it out:
Reboot the computer and before the Windows Logo SCREEN appears tap F8. If you're lucky, you'll have the option to boot into Recovery Console.

If so, read here:
http://www.help2go.com/Tutorials/Windows/C:%5Cwindows%5Csystem32%5Cconfig%5Csystem_missing_or_corrupt.html
and also here:
http://support.microsoft.com/kb/3075451. If you have a working floppy drive, you can download the Windows XP Setup boot DISKS (six volume floppy set):

http://support.microsoft.com/kb/310994/en-us

Be sure to get the right set; Windows XP (Home or Professional), Original, Service Pack 1 (SP1), or SP2.

2. Have you tried the options available on the 'Windows Advanced Options Menu"? At start-up, tap the F8 key about once per second until the Windows Advanced Options Menu appears. I would try in the following order:

o Last Known Good Configuration
o Safe Mode
o Safe Mode with Command PROMPT

3. How to start the System Restore tool at a command prompt in Windows XP (Safe Mode with Command Prompt). A system restore to an earlier time will also load version of registry for that time:

http://www.easywindows.com/easydos/edmessages/977.html

http://support.microsoft.com/kb/304449/