[SOLVED] PC starts up automatically after complete shutdown, time and date resets.

[Anubrata Khan]

So, I have been facing a weird problem for a few days now. Whenever I shut my PC down, it turns back on right after it finishes shutting down. The only way to prevent it is to unplug it form the power source. Also time and date keeps messing up each time I start it up but there's no CMOS battery low warning during boot. Another unusual thing that happened before the problem started is one time during boot I saw this message that said "main BIOS is corrupted" and a restore is being performed from the backup BIOS. Everything went fine after that until one day my PC stared turning back on after full shutdown with time and date messed up.
Any idea what could be the problem? Mobo - Gigabyte B75M-D3H

 

[SkyNetRising]

Change the battery.
Also check wake on settings in BIOS.

 

[Anubrata Khan]

Change the battery.
Also check wake on settings in BIOS.

Yup! that did it