Chrome shutting PC down

[Spectralware]

So i am experiencing a veeeery weird bug. Everytime i open Chrome, if i open 2 tabs, one being Facebook and the other one being Youtube, my PC just shuts down for no reason at all. Any hint? Nothing else makes the PC shuts down, i didn't find any error or anything, there are no virus on my PC and doing the same thing on other browsers doesn't affect the PC at all.

 

[dudeman509]

System specs incl PSU make/model?