Worst Practices

The recent issue with your "overlay" point to a situation that NEVER, EVER should be allowed to happen. Apparently, your software reaches out to YOU during the boot process of another application... assuming the overlay is enabled. NOT when someone tried to USE the function.THEN apparently, if there is any error on your part, you 100% shut down another application, i.e. prevent it from running AT ALL.

You should be ashamed and immediately fix it so that any failure on your part does NOT prevent users from playing whatever game they were intending to play. ANY failure of YOUR software must only come after the game is safely and fully launched and a simple error dialog about why the overlay won't be working needs to b presented to the user. Period.