Disable Geforce Experience. This action will disable the graphics card driver' service as well. Through the overlay, you can access the main features of GeForce Experience app.
So this is it, you can "cure" Horizon by disabling Geforce Experience, you only need to use the "exit" option on the tray before playing the game. The Game Experience app isn't needed to run games smoothly on your system. Through the overlay, you can access the main features of GeForce Experience app.
I do not want it to touch my game settings at all.
NVIDIA GeForce Experience Service (GfExperienceService.exe) - The main GeForce Experience service.
To disable it entirely: Click on the System Tray to show hidden icons. However, GeForce Experience likes to remind me of this with a notification almost every time I open a game, which is getting rather annoying: Is there any way I can disable this notification? The device should be working fine, but you won't get any update notification in.