If the storage device is internal, go to step 2.
If the storage device is a disc, ensure that your computer is turned on. Then, insert the disc into the optical drive.
If the storage device is an external device other than a disc, connect the storage device to the computer.
Turn on or restart the computer. Before Windows starts up, repeatedly press and release F12 or Fn+F12 (depending on the keyboard settings) until Startup Device Menu is displayed.
Select the desired storage device and press Enter. The computer then starts up from the device you select.
If you want to select a permanent startup device, select Enter Setup on Startup Device Menu and press Enter to start the Setup Utility program. For more information about how to select a permanent startup device, see Changing the startup device sequence permanently.