As the system is rebooting, before Windows loads
Can you tap the F8 key
You should be in the Windows Advanced Options Menu
There may be an option to Disable Automatic restart
Select it and try restarting again Normally
If you get another error message, see if you can write down the whole message and post it back here
Also, it won't even let us re-install windows or repair it.
Did you put the CD in the drive
Then go into the bios and switch the booting order to CD first?
You may have to reboot the computer twice after saving the change in the bios