Have u ever forget your xp password and are forced to do formating your drive,then there is a simple trick to retrieve your password using a software,
using this you can even get password of your system administrator
steps in it
1.download this software(approx-700kb)

Using The Software
1.select attack type
i)Hashes
2.click dump from memory
now you can see a list of user with their password
in certain cases this will not work so choose
1.Brute-Force Attack
i)now click start recovery

it may take about 15 minutes to find the password
enjoy the trick