Hi,
I understand that Windows 10 is preview only but I believe that is not a Windows issue but something I'm missing. Here is what I do from elevated command prompt:
> docker-machine --version
docker-machine version 0.2.0 (8b9eaf2)
> docker-machine --debug create -d hyper-v dev
(tons of output from machine - https://gist.github.com/alek-sys/067b15158a6fd04ba792)
INFO[0063] Got IP, waiting for SSH
DEBU[0063] [executing ==>] : C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe (( Get-VM -Name dev ).networkadapters[0]).ipaddresses[0]

DEBU[0067] [stdout =====>] : fe80::215:5dff:fe00:603

(DEBU[0067] [stderr =====>] :*

And that is it. It hangs for a while, then I stop it with Ctrl+C. When I go to Hyper-V manager - dev machine is there, I can connect to it and everything seems fine.

My guess is ipv6 - Hyper-V assigns fe80::215:5dff:fe00:603 to new create machine, I cannot do ssh -6 fe80::215:5dff:fe00:603 so this might be the reason?

OS Name: Microsoft Windows 10 Pro Insider Preview
OS Version: 10.0.10074 N/A Build 10074