I have a compatible system with intel WiDi and it has been working with Netgear's Push2tv perfectly, until some update broke everything, now I can't even see the button to project to a wireless display from the devices > project option in the side panel.
I tried to update the drivers to the last version and update the WiDi tools using the update tool but I'm getting the same issue, your OS is not compatible with Intel WiDi. Please review this with Microsoft as it's a very good technology, but the people will lose the patience with all these mistakes.