Progressbar stops at 60% and computer shuts down

[KingNothing83]

I`m following this guide for updating from Sierra to Catalina: https://www.tonymacx86.com/threads/update-directly-to-macos-catalina.284463/

Did the preparation, but when I started the installation process, the bar under the Apple logo goes to about 60% and then the computer shuts down. When I start it again, I get these options (Sierra in the hdd that has OSX on it). No matter which one I choose, I just get sent in a loop.

I`m currently using the integrated gpu on the motherboard.

 

[KingNothing83]

So; I left my computer alone for some time yesterday, and when I started it up again, the progressbar went all the way up. But still I in a loop and back to where I started...