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With the recent shift in asp.net stack going mostly open source, they have advocated uninstalling the beta bits that were installed to prevent nuget nightly from being accidentally pulling the GACd dlls, therefore the way your project convert works fails to "detect the MVC4 install", thus it fails to do the install of the controls with the error message, "ASP.NET MVC 4 installation could not be detected. Please install ASP.NET MVC4"