Set Password Policy.

Step - 1  Go to Control Panel.

Step - 2  Open Administrative tools.

Step - 3  Open Local Security Policy.

Step - 4  Click Account Policies.

Step - 5  Open Password Policy.

         (6 Type Of Policy).

    1. Enforce password history

             This security setting determines the number of unique new passwords that have to be associated with a user account before an old password can be reused. The value must be between 0 and 24 passwords. This policy enables administrators to enhance security by ensuring that old passwords are not reused continually.


    2. Maximum password age

             This security setting determines the period of time (in days) that a password can be used before the system requires the user to change it. You can set passwords to expire after a number of days between 1 and 999, or you can specify that passwords never expire by setting the number of days to 0.

    
    3. Minimum password age

             This security setting determines the period of time (in days) that a password must be used before the user can change it. You can set a value between 1 and 998 days, or you can allow changes immediately by setting the number of days to 0.


    4. Minimum password length

             This security setting determines the least number of characters that a password for a user account may contain. You can set a value of between 1 and 14 characters, or you can establish that no password is required by setting the number of characters to 0.


    5. Password must meet complexity requirements

             This security setting determines whether passwords must meet complexity requirements.


    6. Store passwords using reversible encryption

             This security setting determines whether the operating system stores passwords using reversible encryption.