Message ID: 8000 -portal Web Site Control Manager detected PORTALWEB is not responding to HTTP requests. Config Manager 2012

If you get this error after SC2012 Config manager application catalog installation, this is due to .NET 4.0.
resolution:
This issue occurs because the Applicationhost.configion catalog file for Windows Process Activation Service (WAS) has the following section defined, and this section is incompatible with the .NET Framework 4.0:

This section should be defined as follows:

Note You can find the Applicationhost.config file in the following location:
%windir%\system32\inetsrv\காண்பிக்

more here: http://support.microsoft.com/kb/2015129