Note: To check whether the ThinkPad computer supports the Passphrase function, enter the BIOS Setup Utility and go to Security
3.Select Security, using the cursor directional keys to move down the menu.
4.Select Password.
5.Select
6.Select Master HDP.
7.Type the current master HDP in the Enter Current Password field. then leave the Enter New Password field blank, and press Enter twice.
8.Press F10.
9.Select Yes in the Setup Configuration window.
Both user HDP and master HDP will have been removed.