Good morning and thank you for posting on the Final Fantasy XIV Technical Support Forums.

What exactly do you mean the game completely shuts off? Does it close down and the computer is fine or does it crash the whole computer, requiring a restart?

Do you have any issues with the controller when it's working (dropped inputs, input latency)?

Do you have any other USB ports that you can plug the controller into?

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!