The "Trusted Sites Zone Template" machine setting should be configured correctly. enabled/disabled Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel\Security Page\Trusted Sites Zone Template HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\CurrentVersion\Trusted Sites Settings\Template Policies Microsoft Tool: Security Compliance Manager (SCM) Microsoft Baseline: Internet Explorer 8 SCM URL: http://go.microsoft.com/fwlink/?LinkId=113940 Microsoft Security Compliance Manager (SCM) Baselines and Settings Packs Microsoft