When you start a low-res full-screen game, Windows will disable Aero - perhaps for some compatibility reason. And if you use any Folder Portals, they will be disabled. Well, this is OK to this point. But Fences 2.0 will display message popup telling that Folder Portals are disabled when Aero is not working. So after I exit the game, I usually get about 10+ of these pop-ups spamming my screen. You'd either make Folder Portals to work in Classic mode or disable this pop-up or something.

 And funniest thing is that I use folder portals to show folders containing game shortcuts! So there's no easy way to avoid these popups.