Web2 server HTTP Error 500.19

JC 2016-05-11

I'm trying to install the web2 server and I get this error when I go to the site

HTTP Error 500.19 - Internal Server Error

The requested page cannot be accessed because the related configuration data for the page is invalid.

Module	IIS Web Core
Notification	BeginRequest
Handler	Not yet determined
Error Code	0x80070021
Config Error	This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".
Config File	\\\\?\\C:\\inetpub\\wwwroot\\SOLIDWORKSPDM\\Web2\\web.config

Requested URL	http://localhost:80/SOLIDWORKSPDM
Physical Path	C:\\inetpub\\wwwroot\\SOLIDWORKSPDM\\Web2
Logon Method	Not yet determined
Logon User	Not yet determined

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