I installed SP 2018.3.3 for my new machine and this pops up: I checked the "step-by-step guide" you linked from that pop-up dialog, and I really don't want to go to and mess around with any sensitive registry stuff on my new PC. I didn't have this problem on my old PC with SP 2017. I'm wondering what kind of situations…
I googled this nice and calmly instructed video, which encouraged me to go through this, just to be safe without possible crashes in SP: https://www.youtube.com/watch?v=SIetNZWQ7RM