title: IIS 7.5, ASP.NET MVC. HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfil
body: <p>I have a MVC3 web site, which works well on IIS Express, but after publishing to IIS 7.5 I got that weird error. The full error message is: </p>
  
  <p><strong>HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.</strong></p>
  
  <p>I published using 'File system' method, for web site I created a separate site in IIS, separate application pool with .NET 4.0 and Integrated mode.</p>
  
  <p>Can you help me diagnose that problem?</p>