Looping boot

Yesterday an NT4 computer was shut down improperly and only would boot to the blue screen. NO REPAIR DISK!!!! so I ran the repair from the NT disk and followed the recommended repairs. Now it will boot all the way until you see the login screen and then and soon as you see the ctrl-alt-del box it just breifly flashes a KMODE_EXCEPTION_NOT_HANDLED bluescreen and reboots, continuosly.

I figure this is a driver thats loading and causing the error and the continuos reboot but I dont know which one. I tried booting in VGA mode and it does the same exact thing.

Is there a utility out there that offers a interactive bootup that could help me?

Thanks in advance