This has been making the rounds this weekend. Folks are claiming it works. I don’t know if it does or if the activation will stick over time.
I post this as information only.
http://forums.mydigitallife.info/threads/64770-How-to-upgrade-from-W7-8-1-without-to-go-through-the-upgrade-process-itself-with-ease
original source? https://www.reddit.com/r/Windows10/comments/3i93mp/no_need_for_a_full_upgrade_to_install_10_from/
I was under the impression that Win10 activation was somehow tied to info their servers which makes me wonder if activation can be yanked.