If your Windows Phone 7 emulator is painfully slow,
check these tips by Jose Luis Latorre Millas. He has also posted a link to an intriguing
session on WP7 performance.
One, is check the DDI version and the driver model, for doing this you should go to Windows button and on the search/execute area type dxdiag & pulse return. There should appear the DirectX diagnostic tool, once there click one of the Display tabs and on the controllers, validate the DDI version. It should be 10 or better.