1. Backup the config file C:\Windows\System32\Inetsrv\config\applicationHost.config and then open it up in notepad.
2. Search for the web site you want to edit.
The <bindings> area is what you are looking for, as you will want to remove the line <binding protocol=”https” bindingInformatino=”*:443:” />
3. Save this file, refresh IIS and start or restart the web site, and you will see your changes you made.