Right click on the ff 14 icon you use to start the game. Goto properties. Compatibility, put a check mark in the 1st box down. Then from the compatability list choose windows xp service pack 2. Click ok. I had the same problem and this fixed it for me.

If your not comfortable doing the above. Right click the icon you use to start the game and click trouble shoot compatability. It should automatically do whats needed.

Good thing is you only need to do this once