Huzzah!

I tried one last thing (I might have mentioned it earlier). Using a Windows 7 install disc, I went into repair mode and the command prompt. I then navigated to the config folder and found that the regback folder had files in it from a few days before the incident! I backed up the files, put the regback files in the main config folder, and rebooted. Hooray! The system booted and all is good. I'll be running my full suite of scans on this thing to make sure it's clean.

Thanks for the help. I'm going to hold onto this TRK disc for future use. It's certainly a much easier to use password cracking disc than others I've used like OPHCrack. Most of the time I get users who simply forgot their user account password.