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

Unfortunately, since there is no error message, we don't have much to go on about what is causing it. Here are a few things that you can try to prevent the crashing:

-Do a clean install of your graphics drivers (this will be an option in the installation process under 'Custom Install').
-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. Make sure to disable any overlays that are present.
-Make sure that any anti-virus software you have has the appropriate exceptions for Final Fantasy XIV.
-Reinstall the game. When you do this, make sure to delete the locally saved data as well (My Documents > My Games > Final Fantasy XIV). Make sure to create a backup of this so you can replace it if it doesn't solve the issue.

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