It is my understanding that although Windows 10 can install automatically onto your PC, it still requires the finanl authority to complete. If that is not given, then it reverts to the original system, or so I have been told. It therefore seems that Chris may have done this without realising what he was doing, as I feel sure many people may have. I don't think it is a question of not configuring the system correctly.
I think Chris was only trying to be helpful to the extent of his knowledge, like the majority of us here, but there are those who do not give any margin of error in their understanding.
I have chosen not to download Windows 10, at least for the time being, as I am perfectly happy with my W7 Ultimate and do feel that there may still be 'bugs' to be sorted out.