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

When did this first start happening? When does it occur, when you first log in or after you have been playing for a bit?

When you updated your graphics card drivers, did you do a clean install of them? Also, there is a more recent version available, you may want to try that as well.

When you reinstalled the game did you also delete the locally-saved data (located My Documents > My Games > Final Fantasy XIV)? this is not deleted by doing a standard reinstallation.

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!