When I double-click on D3 on my desktop the launcher loads fine and says it's up to date and everything. But then when I click 'play' the diablo skull pops up as it should but then it disappears and the game never launches. I try to load it up again but I get 'Diablo 3 is already running'. I then open up the task manager and Diablo 3 isn't even listed. This is a new computer that me and my buddy built. Any idea what could be wrong?