Recover Windows 7 Administrative Pasword

Windows Administrative Pasword Recovery System:
 Firstly  enter your computer Windows DVD. Press any key CD/DVD . DVD instal will begin. Select repair your computer. Select problematic operating system. Click system Restore link.
 Select this date which date pasword lost.
 Restart your computer.
 If Windows 7 CD is absent . Go to advanced boot option. Select Repair your computer.