Windows 10 deployment via WDS in Hyper-V VM not working

Hello all,
I have WDS (Windows Deployment Services) running Windows Server 2012 (not R2) which is used to deploy Windows 7 and Windows 8.1 without problems.

Now I want to deploy Windows 10, but the problem is - when I add Windows 10 (build 10240) boot.wim to my WDS and try to network boot a virtual machine (hyper-v), windows logo appears and nothing else.

Screenshot where boot process stops and doesn't continue:


However, when I try to network boot using a physical hardware (a laptop), boot process works just fine, everything is as expected.
The some goes for using Oracle VM Virtualbox; when I do a network boot in this virtual machine, it works.

So my guess is there is a problem with Hyper-V.
I'm using Hyper-V on Windows 8.1 x64.

Anyone else has this problem ?

Problem solved.
Due to my unique environment, I had a different value under DHCP 67 option Bootfile name. By 'different' I mean some custom bootfile name we use in our environment.
Once I changed it to "\boot\x64\wdsnbp.com" it worked in Hyper-V too.