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

When did this start happening? Do you recall anything changing/updating on your PC that coincides with this?

When you reinstalled the game, did you remove the files in the 'My Documents' folder (My Documents > My Games > Final Fantasy XIV)? If not, try removing that folder. Be sure to make a backup of this just in case it doesn't resolve the issue.

Also, make sure to disable any overlays you may have open and close any unnecessary programs.

Finally, 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!