Long story short guys, so I was upgrading my ASUS Notebook to Windows 10 this morning, everything seemed to be going perfectly (I was performing a clean install), but all of the sudden for some reason, during at one point in the installation, my notebook turned off by itself, completely. It was after copying Windows files, while getting devices ready. After that, I booted it back up, and it kept going with the Windows installation, to the point where it got into the OOBE screen, changed all of my settings, and I was able to get into the Windows 10 desktop, but now, it keeps turning off by itself, even while browsing the UEFI BIOS, I haven't timed it yet, but it seems like these hard shutdowns are happening after a certain amount of time, at least it seems like it. My notebook was running Windows 8.1 Pro before this install disaster, and it was behaving like a champ, rock solid. What could be causing this? could really use your help guys.