Step 1: After you start the computer, immediately and constantly press the BIOS key to open the BIOS Setup Utility interface.
Tips: The BIOS key can be F2/Del/Esc/F1/F8/F9/F10/F11/F12. For instance, the BIOS key of ThinkPad laptop is F1, while that of Asus laptop is Del.
Step 2: Input the supervisor password and press Enter to access Phoenix BIOS Setup Utility, as the following screen shot shows.