Thank you for the update BloodShadow.

As you are reluctant to try a reinstallation, I'll recommend a few things that may solve the issue. Just be aware that reinstalling might solve the issue if these don't. Here are a few things we can try:

First, try a wired connection as opposed to the wireless one you are using, as well as resetting your router by turning it off and back on.
Second, you can try doing a clean boot. Simply open the task manager and select the 'Start up' Tab. Disable everything here and restart the PC.
Update your graphics card drivers .
Make sure your anti-virus/firewall has an exception for the game.
Check the following Port Ranges on your router/modem to ensure that the following Port Ranges have been opened/forwarded/triggered:
▼TCP
54992 through 54994,
55006 through 55007,
55021 through 55040
Your ISP may forward these ports for you.*

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!