Description:

chntpw is NT SAM password recovery utility. This little program
provides a way to view information and change user passwords in a
Windows NT/2000 userdatabase file. Old passwords need not be known
since they are overwritten. In addition it also contains a simple
registry editor (same size data writes) and an hex-editor which
enables you to fiddle around with bits and bytes in the file as you
wish. If you want GNU/Linux bootdisks for offline password recovery
you can add this utility to custom image disks or use those provided
at the tools homepage.