Cannot install ASP.Net MVC 3

I tried installing MVC 3 from the download in http://www.asp.net/mvc/mvc3 - both with and withou开发者_如何学Ct the Web Platform Installer. As soon as the download is finished, the installer says installation is finished, yet I get no observable effect - I can't create MVC projects and it doesn't appear in Uninstall Programs.

Any idea how I can get MVC 3 to install?

Edit: Forgot to mention, I have the just-released SP1 installed.

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Look in the eventlog to see if there any errors related to Windows Installer.

We had a similar issue, because we had the SP1 beta installed. Uninstalling the beta, and then running the installer worked for us.