If you are a Windows Phone Developer combined with adequate amounts of geek, you will most likely have upgraded your work machine to Windows 8. All is good initially until you open your latests and greatest solution in Visual Studio 2010 and hit F5.
You get either this
The solution is to install the SDK version 7.1.1, which is now available from Microsoft. It takes a while to install, so be patient. But in the end you see the sweet nectar of emulation running on your shiny Win8.