Acer Predator G3610 - screen flickering

Hello!

I bought my predator G3610 in 2012 and it worked fine until 2015. The screen started to flicker even when opening the browser, making the computer uncontrollable during the time it flickers. This would happen every minute and I gave up on it and have left it be ever since. A few days ago I started to give it a go and see what the problem is and when the computer is in safe mode, it does not flicker. I pressed on alt + F10 to reinstall the whole OS but it starts flickering when I get to the point that it installs "cleanup" at 34/35 and it doesn't install further beyond this point. Just flickers, freezing the PC, the screen goes back, then back again, works for 10 seconds and then starts flickering and repeat. I let the PC be on through the night, only to find it doing the same thing in the morning when I was getting ready for work.

The specs are awesome still to this day, i7 processor etc etc and it would be better if I somehow could repair this PC instead of buying a new one for 1000 Euro as I paid for this one in 2012.

What could the problem be? Is there anyway I could fix this without having to buy a new PC? Why does it flicker even during reinstall of the OS? And at a certain point, at the very end of the installation?

Thanks in advance.