Blue screen restart loop

Hi, people on the internet. I have a big problem with my editing/gaming build, it has been a reliable system for the past 4 years, yet about a week ago went full BSOD loop and Win10 will not complete the installation process. The specs: CPU: Intel I7 7700k (auto overclocked by MOBO) CPU...

So just out of the blue my sister's PC didn't wanted to boot anymore, it fires up but no beeps, and a curious thing that happens is that it can't be turned off by keeping the power button pressed, just by turning off the power supply or pulling the cord directly. So far what I've done: Cleared...