Enable Secure Boot in Windows ThinkPad Turn on the PC by pressing the Power button. When the red or white Lenovo Logo appears, press, or hold F11 until the BIOS screen appears. Opening the BIOS setting might vary as per Motherboard OEM. Navigate to the Security tab using the keyboard arrow keys. Navigate to the Secure Boot submenu using the keyboard arrow keys, and open the menu by pressing the Enter key. Enable or Disable the SecureBoot function by pressing Enter on the Secure Boot menu entry.
