Blue screen, reboot then bios settings changed by itself

[Ascorbate]

As the title says, what might cause this problem?

 

[Dark Lord of Tech]

List your specs so members can help you?

 

[Ascorbate]

List your specs so members can help you?

MOBO: ASUS M5A78L-M LX3
CPU: AMD FX-6300
GPU: R7 250X 1GB
RAM: 8 GB Hyperx Fury Blue Kingston 1600Mhz
HDD: 1 TB WD Blue.
PSU: Sentey SCP 550 Watts 80 plus certified