After installing .NET Framework 4.0 on a machine there is a few configuration changes you need to do to IIS in order to get a ASP.NET 4.0 page running. First set the Application pool to run in ASP.NET v4.0 "mode". Then you need to allow ASP.NET v4.0.x to run. This is done in the ISAPI and CGI Restrictions found on the server level. Select...