Installation problem. HTTP Error 403.18

Topics: Installing Orchard
Nov 7, 2014 at 1:22 PM
Just installed via web platform. Running on windows7pro, IIS7.5
When I try to browse to the site, I get the following error:
HTTP Error 403.18 - Forbidden
The specified request cannot be processed in the application pool that is configured for this resource on the Web server.

The application pool exists and is v4.0 Integrated.

The most likely causes and things to try are not that helpful.
the url is in the form http://<host.server.tld/orchardsite>
there is an entry in the hosts file for host.server.tld

any help would be appreciated.