when pc is fully locked & u have 2 get in dont worry in past days v used erd cd or oph cd but now days most pc have no cd or dvdrom.so v have to use some other way here is one.
v need 2 softwares 1.erd commander[i used erd 2005]
2.petousb
download these 2 softwares from net easly available.when u have these both then u should empty ur usb because v use usb to break admin password.
open petousb in this application ur usb will b automaticly seleted if not use refresh boton.
then select erd file or give erd files path in petousb.then click on start petousb will formate ur usb & write erd files on ur usb after completion it is done. ur usb is now ready to break any pc password.
start ur pc in boot order set boot from ur usb or removeable device.
usb will boot & erd will run its setup after that click start >locksmith>& reset any user passwor including administrator