League of Legends won't launch!

So I have never had a problem like this before and I have been playing league for about a year now. When I bring up the launcher everything is fine, but when I press "Launch" nothing happens. I have tried every forum recommended trick on the subject. I have tried to delete the lol_launcher and lol_patcher. I have tried to uninstall the game and re install it. I have tried to "repair" in the launch menu. Someone please help me! All i want to do is get back to the game I love.