Black Screen w/ Cursor, Sound, and Flashing on start, no video or input

Hello,

I just purchased GW2 today hoping to play with my friends, but for some odd reason the game will not work for me. When I launch the game, the in-game cursor appears and there is game sound, but the entire screen flashes white a few times and the window stays smaller, not full screen (like its appearing to try to do). The screen also stays black and doesn't seem to be taking any of my input (other than the in-game mouse cursor moving. I can leave the game running like this for (seemingly) forever and all I get is a black screen with sound.

Upon researching, I know other PC users faced an extremely similar problem with Star Wars: Battlefront when the game first launched and the solution there was to create a user.cfg file and fill it with the following lines:

Thread.ProcessorCount 4
Thread.MinFreeProcessorCount -2

I tried this and it did not work. I also tried updating all of my drivers, restarted my computer about 5 times, and also ran a clean boot on my PC (which was also suggested when people ran into a similar problem. I have also reinstalled Origin and repaired the game through origin but none of this has been working, almost bringing me to the point of wanting a refund for my purchase. 

Any help is incredibly appreciated!

My system specifications are:

Intel Core i7-4500 CPU @ 1.80GHz 2.40 GHz

8 GB of Ram

64 Bit Windows 10 Home

(touch screen if that is relevant)

GeForce GT 745M

1920 x 1080, 60hz

Driver version 364.72