Ophcrack, Administrator password recovery and Windows User

Ophcrack is a program to passwords recovery for Windows XP users and administrators. While other programs sonoin able to reset the password recovery, Ophcrack can recover, albeit with some limitations. In fact, for the recovery of used tables (tables), only some of which are available free of charge.
As for Windows XP, Ophcrack, with tables available for free, you can recover passwords consist of letters and numbers, but not special characters, while for Vista (which has a password recovery system more robust) the thing is difficult: it can only recover passwords through dictionary changes (unless you buy additional pay tables, but there are limitations).
The speed with which passwords are recovered is impressive, if you have a powerful processor, serve not more than 5 minutes.
Ophcrack can be installed on Windows, by using a bootable CD (if you want to recover the administrator password).

Ophcrack