t has occurred one or more times to many of us – we install a new Windows, or add a new user, or simply get distracted with other things.  And then when we wish to log on we all of a sudden notice that we do not remember our Windows or BIOS password anymore.

Attempt to recall the possible password.  Try to log in with most often used passwords
It is possible that you may not have assigned any sort of password.  So try to leave the password blank and press ‘Enter’
Check if any other user has an account on your Windows computer, with administrative level access.  If so , you can let that user designate you as an administrator.