Have u tried booting in safe mode yet? You can do it as u restart your computer. Depends what laptop it is but hold either esc, f2, f10 or f12. Should give u an option of opening in safe mode. Try normal safe mode if it don't work try booting with networking. Last but not least is via command promt but would need a computer in front of me to explain more. You should be able to get in if using command promts to reset your account