Ophcrack is a Windows password cracker based on a time-memory trade-off using rainbow tables. This is a new variant of Hellman's original trade-off, with better performance. It recovers 99.9% of alphanumeric passwords in seconds.

It works for Windows NT/2000/XP/Vista/7.

This package contains ophcrack with QT4 based graphical UI. Please note that it can be used in command line as well.