A computer includes a mother board, a standby power source, a BIOS display, and a BIOS user input. The mother board includes a storage unit. The storage unit stores BIOS software and BIOS settings of the computer. The standby power source is configured for providing a standby voltage when the computer is powered but not started up. The controller is configured for reading the BIOS software and the BIOS settings from the storage unit, driving the BIOS display to display a BIOS UI based upon the BIOS software and the BIOS setting, and editing the BIOS settings based upon inputs from the BIOS input unit upon the condition that the controller, the BIOS display, and the BIOS input unit receive the standby voltage.