This technique is made to help you solve the forgotten password problems, but not to guide you to sabotage others. Thank you for your wisdom.
This is done in two stages, and this is the first step to do is to replace Utilman.exe by the Windows command prompt. You can follow the steps on the second link at the end of the chapter.
First, if you have the problem on the Windows password, be sure to insert the DVD windows7 installation in the drive of your computer. if your computer does not have a reader follow: how to create a bootable USB windows7.