I am newbie to Win10 on RPi, today I got RPi booted on RPi, spent quite a lot of time researching in Power shell command before I got things working,
Before I use Enter -PsSession Command I used winrm and got all the problems resolved, following link may be of use to you
https://social.technet.microsoft.com/Fo ... ess-denied
-This is the link which has helped me in resolving my issues
Another aspect I found that for the power shell command "Enter-PsSession" the laptop from where you connecting to RPi need to have a password set. Like this there are many pre-requisites for the Powershell commands to connect to RPi, just do some research you will figure out what exactly the problem is, that is the approach I took to resolve my issues.
I know I have not given a clear answer to your question, however I am sharing my experience in getting Win10 working on RPi. If you can wait for some more time of one of Microsoft folks may give a much more crispy answer