Press F12 or (Fn+F12) rapidly and repeatedly at the Lenovo logo during bootup to open Windows Boot Manager. Select boot device in the list. This is a one-time-option.

Note: If the boot device is disabled in the BIOS, then the boot device cannot be selected using this method.

The following example shows a system that has an option to enable or disable the Boot device List F12 Option.

Go into the BIOS to enable Boot device List F12 Option (option is usually under the Startup tab).

• BIOS key for ThinkPad: F1  Recommended ways to enter BIOS - ThinkPad, ThinkCentre, ThinkStation
• BIOS key for IdeaPad: F2 (or Fn+F2)  Recommended way to enter BIOS - ideapad
• BIOS key for Desktops & All-in-Ones: F1  Recommended way to enter BIOS for Lenovo Desktops & All-In-Ones - Windows

The BIOS simulator can display BIOS examples for many systems, see Lenovo BIOS Simulator Center: An interactive BIOS Setup utility - Windows.

1. Restart your computer.

2. Immediately press the BIOS key 5-10 times after the power on button is pressed or restart the system and press the BIOS key when the Lenovo logo is displayed. The BIOS key varies based on your product series.

• BIOS key for ThinkPad: F1
• BIOS key for IdeaPad: F2 (or Fn+F2)
• BIOS key for Desktops & All-in-Ones: F1

If you need more help on how to access the system BIOS, visit Popular Topics: BIOS and UEFI (lenovo.com).

3. Navigate to the Boot menu using the arrow keys on your keyboard.

4. Select the hard drive or device you want to set as the first boot priority using the arrow keys. 

5. Press the “+” or “-” key to move the selected hard drive or device to the top of the boot priority list.

6. Save the changes and exit the BIOS setup by pressing the appropriate key (for example F10 or ESC).

Your computer will now boot from the selected hard drive or device as the first priority in the boot sequence.