Windows 7 Deployment

Hi,

I am currently using SCCM 2012 SP2 with the following infrastructure,

AD on Server 2012R2

SCCM 2012SP2 on Hyper-V VM with Server 2012R2 OS

DHCP is also running on SCCM VM

ADK8.1

Currently SCCM is running standalone site.

I am trying to deploy Windows 7 to deploy on HyperV VM. I am following the below article,

http://www.toolzz.com/?p=879

Settings are quite identical to the above mentioned article but OS Installation never starts when I power on the HyperV VM, screenshot is attached,

Kindly guide how I can deploy windows 7 using SCCM 2012SP2.

Thanks

Nasir karim