Password Considerations; Power-On Password; Administrator Password; Hard Disk Password - Lenovo ThinkCentre M91p 4524 Hardware Maintenance Manual

• Administrator Password

• Hard Disk Password

You do not have to set any passwords to use your computer. However, using passwords improves
computing security. If you decide to set any passwords, read the following sections.

Password considerations

A password can be any combination of up to 64 alphabetic and numeric characters. For security reasons, it
is recommended to use a strong password that cannot be easily compromised. To set a strong password,
use the following guidelines:
• Have at least eight characters in length
• Contain at least one alphabetic character and one numeric character
• Setup Utility program and hard disk drive passwords are not case sensitive
• Not be your name or your user name
• Not be a common word or a common name
• Be significantly different from your previous passwords

Power-on password

When a Power-On Password is set, you are prompted to type a valid password each time the computer is
turned on. The computer cannot be used until the valid password is typed in.
Administrator password
Setting an Administrator Password deters unauthorized users from changing configuration settings. If you
are responsible for maintaining the configuration settings of several computers, you might want to set an
Administrator Password.
When an Administrator Password is set, you are prompted to type a valid password each time you try to
access the Setup Utility program. The Setup Utility program cannot be accessed until a valid password
is typed in.
If both the Power-On Password and Administrator Password are set, you can type either password. However,
you must use your Administrator Password to change any configuration settings.
Hard Disk Password
Setting a Hard Disk Password prevents unauthorized access to the data on the hard disk drive. When a
Hard Disk Password is set, you are prompted to type a valid password each time you try to access the
hard disk drive.
Notes:
• After you set a Hard Disk Password, your data on the hard disk drive is protected even if the hard disk
drive is removed from one computer and installed in another.
• If the Hard Disk Password is forgotten, there is no way to reset the password or recover data from the
hard disk drive.

Setting, changing, or deleting a password

To set, change, or delete a password, do the following:
1. Start the Setup Utility program. See "Starting the Setup Utility program" on page 43.
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ThinkCentre Hardware Maintenance Manual