Here's a solution.
Open up the "Computer" folder by clicking your desktop.
You'll see an option that says "GO" on type of the menu bar click it, then you'll see "Computer"
Once you click that the folder named "Users"
Then click "Shared"
You'll see some folders with blizz name on them, Delete all the folders that are related to WOW.
Please make sure the game is Closed.
Then go back to the "Computer" folder. Click "SYSTEM"
Then click "Library"
Anything that has world of warcraft, or Blizzard on them DELETE THEM.
Once you're done, make sure you empty the "Trash" completely.
Now restart the game by using "Wow Launcher".
Once you're logged in, click "ESC" Go to system.
Go to "Graphic"
Click "recommend" reset everything.
If it takes you to the windows screen go full screen shouldn't have any problem. If not reset it more than 3 times. I found the solution a while ago, I've been too lazy to post it.