If we forgot our Windows password and our computer is domain joined, we should contact our system administrator to reset our password. If the computer is not domain joined, we can reset our password by using a password reset disk or by using another administrator
However, If we forget the administrator password and don't have a password reset disk or another administrator account, we won't be able to reset the password. If there are no other user accounts on the computer, we won't be able to log on to Windows and will
need to re-install Windows.
Based on the situation, and according to Microsoft Password policy, we may have to re-install this Windows 7 machine.
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