After you upgrade your computer to Windows 8.1 Preview, you cannot run Windows Phone 8 Software Development Kit (SDK) emulator (XDE.exe) in Microsoft Visual Studio 2012.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Id. de artículo: 2864215 - Última revisión: 26 jun. 2013 - Revisión: 1