Article ID: 2864215 - View products that this article applies to.
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.
To resolve this issue, install Visual Studio 2012 Update 3
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Article ID: 2864215 - Last Review: June 26, 2013 - Revision: 1.0