A brand new installation of Visual Studio 2013
You are trying to create a new project/solution and immediately after choosing the type of the application (eg: Single page web application) an error raised saying referenced file cannot be found, followed by the error code HRESULT 0x80070002
Select the build of your Visual Studio NuGet client and move to the download page
Download the package (After closing down the Visual Studio, if yet open) and install the package
Restart Visual Studio and the error must have been gone by now.
Happy Programming guys ;)