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 "topform", and you want to change itz password to "sorry"

Type as shown below:

C:/net user topform Bhatia <====

tats all u have successfully changed ur friendz password to "sorry"

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