http error 404.3 - found iis7

http error 404.3 -  found iis7 You should install IIS sub components from Control Panel -> Programs and Features -> Turn Windows features on or off Internet Information Services has subsection World Wide Web Services / Application Development Features There you must check ASP.NET (.NET Extensibility, ISAPI Extensions, ISAPI Filters will be selected automatically). Run from cmd: %windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_regiis.exe -ir Finally check in IIS manager, that your application uses application pool with .NET framework version v4.0.