To enable the configuration change detection feature, do the following: 1. Start the Setup Utility program. 2. From the Setup Utility program main menu, select Security . Configuration Change Detection, and press Enter. 3. Select Enabled and press Enter. 4. Press F10 to save changes and exit the Setup Utility program. Press Enter when prompted to confirm the exit. Viewing and changing settings The Setup Utility program menu lists various items about the system configuration. To view or change settings, start the Setup Utility program. See “Starting the Setup Utility program” on page 115. Then, follow the instructions on the screen. You can use either the keyboard or the mouse to navigate through BIOS menu choices. The keys used to perform various tasks are displayed at the bottom of each screen. Using passwords By using the Setup Utility program, you can set passwords to prevent unauthorized access to your computer and data. The following types of passwords are available: © Copyright Lenovo 2013 • Power-On Password • 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, and deleting a password To set, change, or delete a password, do the following: 116 ThinkCentre M83, M93/p User Guide 1. Start the Setup Utility program. See “Starting the Setup Utility program” on page 115. 2. From the Setup Utility program main menu, select Security. 3. Depending on the password type, select Set Power-On Password, Set Administrator Password, or Hard Disk Password. 4. Follow the instructions on the right side of the screen to set, change, or delete a password. Note: A password can be any combination of up to 64 alphabetic and numeric characters. For more information, see “Password considerations” on page 116. Erasing lost or forgotten passwords (clearing CMOS) This section provides instructions on how to erase lost or forgotten passwords, such as a user password. To erase a lost or forgotten password, do the following: 1. Remove all media from the drives and turn off all attached devices and the computer. Then, disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer. 2. Remove the computer cover. See “Removing the computer cover” on page 36. 3. Locate the Clear CMOS /Recovery jumper on the system board. See “Locating parts on the system board” on page 14. 4. Move the jumper from the standard position (pin 1 and pin 2) to the maintenance position (pin 2 and pin 3). 5. Reinstall the computer cover and connect the power cord. See “Completing the parts replacement” on page 103. 6. Turn on the computer and leave it on for approximately 10 seconds. When you hear short beeps, turn off the computer by holding the power button for approximately five seconds. 7. Repeat step 1 through step 2. 8. Move the Clear CMOS /Recovery jumper back to the standard positio...

Dieses Handbuch ist für folgende Modelle:
PC Desktops - ThinkCentre M83 (10BE) (10.43 mb)