How to change the first Boot device?

Step 1: Press the power button and continuously press F7 to enter the boot menu, then select “Enter Setup” to access the BIOS.
(Or press the Delete key repeatedly immediately after pressing the power button to enter the BIOS settings)

Step 2:Go to Boot→Boot Option #1,and set the correct boot device as the first boot option.

Step 3:Go to Save & Exit → Save Changes and Exit → Yes to save the changes and exit.
(Or press F4 to quickly save and exit.)