Follow the instructions to remove the system management
password if you forget your system management password.
If you have set a supervisor password and remember it:
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Restart the computer. When the logo screen is displayed,
immediately press F1.
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Type the supervisor password to enter the UEFI BIOS menu.
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Select by using the arrow keys.
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Type the current supervisor password in the Enter Current
Password field. Then, leave the Enter New Password field
blank, and press Enter twice.
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In the Changes have been saved window, press Enter.
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Press F10 to save changes and exit the UEFI BIOS menu.
If you have not set a supervisor password,
contact a Lenovo-authorized service provider to have the system management
password removed.