Well, I came from PIC experience and mine was exactly the reverse one.
If Framework 4 "repair" pops that means it was already installed, so ignore it. After you install my mod, in the installer check all the boards you have. After that launch Arduino from the Start menu, not the zip folder. Everything should go smoothly after that if your board works correctly in another machine. If not, it might be broken. (or be a cheap clone)