I had the exact same problem when I first installed the 2015 driver station. When it was installing, there were errors and it said that the driver station was not installed, but when I checked my programs, the driver station program was there. But whenever I ran it, it just froze, and I had to use task manager to close it, because the exit button wouldn't work. I was reading on it and saw the solution with the firewall, but I didn't even have McAfee installed. The way that I solved the problem was by going to the add/remove programs control panel, selecting "National Instruments Software" in the list, and and clicking "uninstall/change". It then gave me options to modify, uninstall or repair the software; I selected the driver station in the list and clicked the "repair" option, and selected the installer folder when prompted to. After the repair was complete, the driver station worked normally.
I hope this helps
