Download the ISO:

1. Start by going to http://ophcrack.sourceforge.net/
2. Select Download ophcrack LiveCD.  This will download a file such as ophcrack-<os>-livecd-<version>.iso.

Boot from the ophcrack-<os>-livecd-<version>.iso. Instructions on how to boot from an ISO are outside of the scope of this article. Once booted from the ISO, you will see the ophcrack start screen. Select ophcrack graphical mode. Let ophcrack run, and the usernames and passwords of the system will be displayed.