Hi Pragnesh,
The method I described in this post is obsolete now as we have a solution out of the box for this problem using the register option that was provided as part of Windows 8 and Windows server 2012 as described here http://blogs.msdn.com/b/virtual_pc_guy/archive/2012/06/26/registering-a-virtual-machine-with-hyper-v-in-windows-8-windows-server-2012.aspx
So unless you are using an old Hyper-V server use the out of the box option. If you are indeed using a Windows 2008 R2 (or earlier) then to rollback you still need the mlink.