If it's crashing on you when you start the game, close every other window you have open. That worked for me. It also opened in this tiny little window, so I had to immediately open settings when the game started and change it to full screen.
I had that as well, but the problem I'm having is that the mouse is really slow and bordering unresponsive, so I barely have time to reply to people and the time based movement stuff just doesn't work.
Oh, I had that problem too. Go into the folder where Thrones.exe is, right click it, select "run as administrator." Now every time you run it through steam it'll run in administrator mode, and it speeds up the mouse reaction a lot.