I had it on 8, not a previous 10 build. It downloaded me directly to 1536.1004. Even after hard reset (and also during the initial setup phase) it is so glitchy as to be unusable.Ensure all updates are properly installed if you are coming from 10.0.10512.
It will install 10.0.10514 and 10.0.101536.1000 first, then 10.0.101536.1004.