Thank you for the reply Endeleon.

I can't say for certain, but I believe you encountered a graphics driver crash of some sort, this might explain why your PC soft-locked and you could only hear the audio. You weren't disconnected form the game properly and it had to find your character in an instance server when you logged back in.

Hopefully it won't happen again, but if it does, try some of the following:

-Switch to Direct X 9 Mode
-Disable any overlays you may have open (your system report says you have Nvidia Geforce. While this usually isn't a problem, it may cause issues)
-Close any unnecessary programs
-Install the game on your C drive if possible

Additionally, there is a newer version of your graphics card driver. It's not terribly out of date, but it may be worth looking into.

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