Originally Posted by dude_56013
Agreed. If there's nothing on it you want, just grab the disc and reinstall with the key. MAKE SURE YOU HAVE THE KEY FIRST. If not, you'll need to find a program that will read Windows 2000 keys and attempt to read it. This would most likely require throwing the HDD in as a slave drive in another computer and then running the program.
Bruteforce is way too much work unless there's truly something critical he needs off of it which he cannot transfer via linux. I don't even know what an example of that would be. Reinstalling is the best solution.
Ophcrack uses Rainbow Tables - it's not your "traditional" brute force attack. It's very, very quick.. Apparently 178 seconds on average!