title: Why can I not install ASPNET MVC2 from the Web Platform Installer? (Error: "requires VS2008 SP1", but SP1 is installed!)
body: <p>I went to <a href="http://www.asp.net/mvc/" rel="noreferrer">http://www.asp.net/mvc/</a> to try to install ASP.NET MVC.<br>
  I didn't know, but MVC is now at version 2.  </p>
  
  <p>There's a nifty thing called the Microsoft "Web Platform Installer" (WPI) which basically is a small installer-driver tool that presents a menu of things I might want to install, to do web things on Windows.  On the menu are things like ASPNET MVC2, but also Drupal, PHP, Joomla, and a bunch of other things. </p>
  
  <p>From <a href="http://www.asp.net/mvc/" rel="noreferrer">http://www.asp.net/mvc/</a>, when I click on the link that says "Install MVC", it resolves to <a href="http://go.microsoft.com/fwlink/?LinkID=185037" rel="noreferrer">http://go.microsoft.com/fwlink/?LinkID=185037</a>, which then pops up the WPI. </p>
  
  <p>But Then!  I get an error dialog that reads "Installing ASPNET MVC2 requires VS2008 SP1".</p>
  
  <p>But I know that I have VS2008 SP1.  </p>
  
  <p>What gives? </p>