Changing XP password without old password

Here is a technique to change XP password of your friend's login pc without knowing any hint or old passwords:just open CMD PROMPT and type as shown below

C:/ net user username newpassword <----for example...If your friend's username is A, and you want to change itz password to B

as shown below:

C:/net user A B<====tats all u have successfully changed ur friendz password to "B"

If you are the admin of pc then go to CMD prompt and type"""""control userpasswords2""""""here you can change the password