I've been playing for a few days now. The first thing I did was to set a lower resolution and disabled Full Screen. Everything worked fine until today, when it suddenly started ful screen. Now I can't select any other resolution besides my native resolution and toggling fullscreen doesn't do anything anymore. Makes me wonder why I ever switched to Win10.

I'm going to look for the config files to reset my settings, but I figured I'd post, maybe someone already had this issue and fixed it. So if anyone has any ideas?

I found the settings:
HKEY_CURRENT_USER\Software\Obsidian Entertainment\Pillars of Eternity

But that doesn't work anymore either. I simply can no longer select any resolution besides my native resolution, it's the only one in the dropdown menu.

I'll turn off the system completely, see if that helps.