>Launch the game
>right click the arc window on the task while the little pre-game pop up is doing it's loading
>press "close window"
>the game now crashes
>the crash leaves an arc process in your processes, even though the game is not running any more
>selecting the task and pressing "end task" does not end the task (Why is that a thing in windows these days anyways? How can end task not fucking kill a task?)
>When you try to launch arc again it crashes with a simultaneous instances message
Tadaaa! Magic!