MSI MS-6534 - Manual (Page 91)

AMI ® BIOS Setup
4-17
Note: If you change these settings, you must reboot the system until it
enters the operating system and then power off the system. By doing
so, the changed settings will come into effect next time you power on
the system.
Power Again
This item specifies whether you system will reboot after a power failure or
interrupt occurs. Available options:
Power Off Leaves the computer in the power off state.
Power On Reboots the computer.
Last State Restores the system to the previous status before the
power failure or interrupt occurred.