Thank you for the reply SekushiMegami.

If this is a new PC, you may want to try updating Windows. There are a few optional updates that probably won't be installed without manually updating.

You can also try a clean boot. Simply open the task manager and select the 'Start up' tab. Disable everything here and restart the PC. This will make sure that no background processes are interfering with the game.

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