I doubt that windows activation has anything to do with it, since we are seeing a bunch of errors that all have to do with Front End Controller communication. I have seen those particular errors before, although they never resulted in a hard reboot. They went away after the RTx.exe app successfully flashed the firmware, which did not happen until I ran RTx.exe with Administrator. You mention running the installer as Administrator, but it's not the installer that flashes the firmware, it's the RTx.exe app, the one that launches on startup and has a shortcut on the desktop (actually IIRC it's only the shortcut that is called "RTx.exe" and the actual app is "RTxLoader.exe" or something).
Have you tried running the app as Administrator?