Generation 1 Virtual Machines for Windows 2003 and 2008 Hangs while booting and Total System Hangs

Hi,

My System has AMD FX 8350 Processor, BioStar TA990FXE Motherboard, 8GB 1600Mhz RAM and Windows Server 2012 with Hyper-V

Virtual Machines created in Generation 2 with Windows Server 2012 Works Fine.

But, Virtual Machines created in Generation 1 with Windows Server 2003 or Windows Server 2008 Hangs while Booting and total system hangs. I have to Reboot the whole system.

Thank You