Hirens Boot: How to remove Windows XP password

     Follow this steps:    

         1. Change your BIOS setup of  your machine to start the booting with CD's or DVD's    
         2. Insert the CD 15.1 Hiren's Boot CD .
         3. Choose the option  : Mini boot into Windows XP .

        4. On the desktop of Mini Windows Xp select HBCD Menu icon-

     5. Now scroll to Programs-paswords / Keys follow Windows Login and finally run the
          application NTPWEdit (Reset XP/Vista/7 User Password)

     6. Now click on the button (Re) open
     7. In the user list box select the user you want to change the password
     8. Now click on change password and insert a new password and  click on OK button
     9. Finally click on the Save Changes button

Note:This process also applies to Windows Vista and Windows 7