Login password cannot  be certified

Discussion created by iaaswee on Nov 25, 2017
Latest reply on Feb 14, 2018 by kvark

On my Windows 10 , i can not be allowed to access my computer with my login password ,the login page shows " The password is not in accordance with the account ",

There are two possibilities:

1: I forgot my password of Win 10 login , or someone else has changed the password

2:The password has expired and cannot be certified by the computer

This is my personal laptop (Dell laptop) ,so no one knows the login password , 

I exclude the first possibility , 

I need some methods or suggestions to solve this problem right now  , 

Thanks .