#change or clear pc,leptop password in command prompt trick:
1.right click on command prompt run as administrator.
2.type" net_ user ".(press enter)
3.then u can see user name in that window...(like ...vijay...sai...or etc..)
4.after type " net _user_ vijay "(insted of vijay u can type ur user name).
5.type " net_ user_ Vijay_ * ” press 3 times enter.(u can also change a new password)
Enjoy ur password is chage or clear.