title: 404.2 Error after installing .net 4.0
body: <p>I have a project which I have upgraded to .Net 4.0, but when I try to access it, I retrieve the following error:</p>
  
  <pre><code>HTTP Error 404.2 - Not Found
  The page you requested could not be displayed because of the settings for the list of ISAPI and CGI restrictions on web server.
  ErrorCode: 0x800704ec
  Handler PageHandlerFactory-ISAPI-4.0_32bit
  </code></pre>
  
  <p>Do I need to do something extra to the IIS 7 or APP pool, when converting an existing site to a .NET 4.0 site?</p>
  
  <p>Also if I look at ISAPI both 32bit and 64bit of the .Net 4.0 is installed.</p>