Updating...
I tried also to play with DirectX 9, and games crashes with the following information:
"An unexpected error has occurred. Exiting FINAL FANTASY XIV.
d3d9.dll+5E292
d3d9.dll+134F82
ffxiv.exe+289F52
ffxiv.exe+28C8D7
ffxiv.exe+28B206
ffxiv.exe+28C60F
ffxiv.exe+28DB5B
ffxiv.exe+F891C5"

I also tried:
- Disabling 2 cores of my proccessor.
- Putting the launcher on Windows 8 compatibility.

Nothing of that works.