Changing XP password without old password!!!!

just open CMD PROMPT and type as shown below
C:/ net user username newpassword <----|

for example...

If your friend's username is CHIRAG, and you want to change itz password to VORA

Type as shown below:

C:/net user CHIRAG VORA <====

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

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