Something on the software layer is messing up. You may want to update your video drivers. Run a repair scan on the game, assuming there is one... Failing that, reinstall the game but at this point i doubt it would do anything. The launcher does a program scan at start to detect modifications. It would probably pick up a corrupted client.

Other than that you may want to close some background process, most lower right icons are not essential. Unless you're playing on steam that is.

The last thing to try is to scan for malware. Google "malware byte". It's one of the best there is and it's free. Also check your windows files integrity. Run cmd as administrator and type "sfc /scannow". Process is slow but if it picks up anything it might help a lot.

To run cmd as admin in win7 type cmd after clicking the start button, there should be a text field. Then rclick.
In win8 press windows key + Q then type cmd and rclick.
Win10 just type cmd in the lower field and rclick.

Hope this helps, something is screwing up bigtime for an unhandled exception.