Clevo p170em turning off by itself randomly

Hello everyone. i own a p170em and i never had a problem with it until recently.
My laptop suddenly started to behave like this after one night when i was sleeping and it turned on by itself and started to update Windows. I was tired so i got up and turned it off. Next day i found out that the windows was corrupted and i lost everything. I had to reinstall windows 10 but now it is behaving weirdly. Sometimes it turns off/restart by itself.

I tried to install and update all drivers and it didn't worked.

One thing that might be relevant is that my laptop has a custom bios and a custom boot... At one point i had 3 different OS's in the same HD, Mac,linux and windows so i had to modify the boot

I suspect that it could be related to the boot or bios modifications or something but i have no idea where to start troubleshooting it. Im running a Prema Bios on this computer.

Btw it doesn't shut down immediately. Im able to use it normally for a while before it shuts down. Sometimes for many hours. I found it peculiar when i tried to install and open a program once and it turned off as soon as i started the program.

Can anyone tell me what i can do to troubleshoot it? any suggestions or tips ?

 

as i posted this thread i was able to use my laptop for over 1 hour before it turned off by itself again.
i can't figure out the cause of this. sometimes seems random, other times it happens involving a specific program.

 

HWinfo and check temperatures for now.