The Demonstration is for EDUCATIONAL PURPOSE ONLY!!! Ophcrack is a free Windows password cracker based on rainbow tables. Ophcrack is great for the beginner password cracker that has the common basic Windows skills. There is a LiveCD for Ophcrack that can be downloaded where no software installation is necessary to recover password. No previous knowledge of the passwords on the system to be known to use the Ophcrack LiveCD. The LiveCD allows for completely automatic password recovery. Ophcrack works with Windows 7, Vista, and XP. Rainbow attacks are done with huge text files that can range from the size of hundreds of MB to hundreds of GB. Some tables are designed specifically for particular operating system hashes. All of the tables in in a Rainbows attack are pre-computed hashes. The tables consist of every possible combination of character on the keyboard. Tables can be downloaded, purchased, or created. You can download free ones offered by Ophcrack here: http://ophcrack.sourceforge.net/. http://ophcrack.sourceforge.net/tables.php XP free small (380MB) http://downloads.sourceforge.net/ophcrack/tables_xp_free_small.zip XP free fast (703MB) http://downloads.sourceforge.net/ophcrack/tables_xp_free_fast.zip Vista free (461MB) http://downloads.sourceforge.net/ophcrack/tables_vista_free.zip YouTube VideoWatch this video on YouTube.