This error occurs when a document is not specified in the URL, no default document is specified for the Web site or application, and directory listing is not enabled for the Web site or application. This setting may be disabled on purpose to secure the contents of the server.
The cause of the problem is that not all aspnet features have been installed or registered. The user must make sure that the needed aspnet features were checked in (turn windows features on and off) and that they ran aspnet_regiis.exe as an admin in the v4 folder (C:\WINDOWS\Microsoft.Net\Framework\v4.0.30319\aspnet_regiis.exe).
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