I installed the Async CTP w/o knowing it would cause problems with Asp.NET MVC 3.
So I\'ve followed every possible uninstall instruction out there re-installed both SP1 and
If you are using Visual Studio 2010 SP1 then the solution might be here:
http://tedgustaf.com/en/blog/2011/4/installing-asp-net-mvc3-on-visual-studio-2010-sp1/