On my system, to disable saving zone information on downloaded files you have to edit the registry setting directly. The Group Policy setting doesn't work. Is this the case on anyone else's system? HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments Set SaveZoneInformation to 1 to disable saving zone information on downloaded files. The Group Policy setting is in: User Configuration/Adminstrative Templates/Windows Components/Attachment Manager