I honestly don't know what works with the current build. I don't have a current build to try it on. I don't get updates or builds on my OS. That was my solution. I'm going through the thread looking for good info on more current builds now. I may redo the entire OP with what I can gather.
I put my solution in the first post, as requested, but I don't know how much help it will be. I don't get updates, because that will undo the GPedit settings and take away that functionality. Before I finished researching a work around I decided I'm going back to W7 for a multitude of reasons. I no longer care what W10 is going to do because my ultimate solution to the Cortana problem is to have her thrown out of the building. I found it interesting that not long after the Anniversary Update (about an hour) which keeps Cortana on whether you like it or not, the FBI announced you should cover your webcams. Coincidence? Maybe, but when Cortana is allowed a free rein she uses the webcams and microphone at Cortana's discretion by default, not yours. The code is there whether you use it or not, and that's one more potential vulnerability to exploit. Turns out I can't actually fire Cortana without barring her from the premises. LOL