Your Processor is quite slow for a game of this magnitude. Issue is; FFXIV only uses 2 cores in your processor, and overtaxes the first core but A LOT. at 1.7GHz there is probably a lot of slowdown and graphical issues I would assume.

Get a copy of RealTemp which you can download online. Start the game up and run it and watch the temps of your first two processor cores. If either of them are above 80C, you are damaging your CPU and it probably cannot handle the game. Edit: Above 90C there is a chance it will start to melt because of the heat.

This game was designed with desktops in mind, however, some laptops can run it, but your processor needs to be faster.

Im not sure that 4200 Series can handle the game either, since its a mobile version of the real cards in desktops. Again don't damage your hardware to play this game, you will regret it later.