If the advice you get on here resuts in it not being fixed,have a look on e-bay you can get a CD on there for 2£-or £3 to remove passwords.
In the meantime see if you can sign in using the administration account in safe mode.
Alienware 17 R4 2017 review
These brilliant Lego posters show just what children's imaginations are capable of
Mac power user tips and hidden tricks
Comment réinitialiser votre PC, ordinateur portable ou tablette Windows ?