Ophcrack is a Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a GTK+ Graphical User Interface and runs on Windows, Mac OS X (Intel CPU) as well as on Linux.
Runs on Windows,Linux and Mac OS X (intel).
Cracks LM and NTLM hashes.
Free tables available for alphanumeric LM hashes.
Loads hashes from local SAM, remote SAM.
Loads hashes from encrypted SAM recovered from a Windows partition.
You can download it from HERE.
All you have to do is burn this ISO image to a CD using your favourite burner e.g. Nero, reboot your computer, go into the BIOS and make sure you can boot your Pc from a CD-ROM. Ophcrack would be loaded and in less than 2 minutes, the job is been done. It gives you even the administrators password.