title: Windows phone emulator is doing a complete OS boot
body: <p>Recently I installed windows phone SDK 7.1. I built a small project using VS 2010 Express Edition and tried to run my first app, but my emulator loads and displays "Windows phone emulator is doing a complete OS boot" and then automatically get closed. And finally i get a error "The interface is unknown".</p>
  
  <p>I am on Windows 7 laptop with 1 GB of RAM.</p>