I had a problem in using the Visual Studio Install that I had in my machine, due to which I decided to re-install everything related to Visual Studio , including Visual Studio itself. During installation procedure, I reached to the point when I was ready with base Visual Studio 2010 installed, and next step was to update system with bunch of other frameworks and patches that included ASP.NET MVC 3, Visual Studio 2010 SP1, and some other. It was making sense to me to install all together with Web Platform installer. Added everything that I wanted to install in Web Platform installer and asked it to install. It happily declared everything done. But when I tried opening the project solution, Visual Studio complaint about missing ASP.NET MVC 3.
On further investigation about why and what, surprise! ASP.NET MVC 3 actually was missing on the system! Web Platform installer was fooling me when it said “Completed everything”. Finally I found that due to Latest NuGet install on my machine, installer for MVC 3, was not able to successfully install.