If you worry about that someone would use your computer when you are not at present, you should read this passage. Here we will show you set the supervisor password through the BIOS Setup Utility. If someone want to login your computer, he or she will be required to input it before accessing the BIOS Setup Utility interface and getting into your computer. So it is a good idea for you to make sure no anyone else would use your computer without your permission.
Step 1: After you start the computer, immediately and constantly press the BIOS key to open the BIOS Setup Utility interface.
Step 2: Input the supervisor password and press Enter to access Phoenix BIOS Setup Utility, as the following screen shot shows.
Step 3: Navigate to the Security item on the menu bar with the arrow keys. And press Enter to open the details settings in security.
Step 4: Select the Enter behind Set Supervisor Password by down arrow key.
Step 5: In the Set Supervisor Password window, input the current password in the first box and press Enter to move to the second box. After that, type a new password, press Enter to go to the third box, retype the new code and click Enter, as shown in the screen shot below.
Step 6: As the Setup Notice window appears, hit Enter to continue.
Step 7: Press F10 to open the Setup Confirmation dialog box and tap Enter to save configuration changes and exit.Step 6: As the Setup Notice window appears, hit Enter to continue.
Attention: If you are worried that you may forget or lose it, you should remove it in time according to the method illustrated in How to Remove Supervisor Password on Windows 8.