Windows 10 shutting down

[WeirdNewbie]

Hi

My computer suddenly shuts down, this only week it happened twice already. Previously i tried to reinstall whole OS, but even that didn't help.Is there any way for me to diagnose the problem. I used Bitdefender to see if i have any viruses but none was found. 

My specs are

RX 480 8GB

16GB HyperX

AMD 7 1800X

Prime X370-A

EVGA 550W

San Disk 128GB

1TB HDD + 3TB HDD

Any help?

[WeirdNewbie]

A little update, the PC seems to still be working because i still can hear my GPU fans working at full speed