I have been doing that, and when I was doing it, the same two updates would always pop up after I try to install runtime. The updates said "no updates left to install" and that those 2 updates always installed correctly but I would always have the same problem, followed by he two updates popping up again. I have checked for updates since then and found more so hopefully it works soon. I am running the 64 bit version of windows 8.1 off a dual boot mac, that I just got set up so it need some a lot of updates