Re: Game minimises at Main screen selection

@mjdsaund  Try forcing the game to open in windowed mode.  Go into Documents > Electronic Arts > The Sims 4, open Options.ini, search for fullscreen , and set it to 0 (zero).

If that helps, you can try windowed fullscreen mode, and you can try fullscreen mode again but with the in-game resolution set to match your monitor.  These settings are with the other graphics options.

If this doesn't help, please disable any apps you use that come with overlays: Discord, Steam, etc.  Disable the EA App in-game overlay as well; the option is under Settings > Application.