Search notes:

Registry: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments

The settings under HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments seem to correspond to those that are configurable with the group policy editor under User Configuration -> Administrative Templates -> Windows Components -> Attachment Manager.

Values

HideZoneInfoOnProperties
SaveZoneInformation
ScanWithAntiVirus
UseTrustedHandlers

See also

File type extensions for Low, moderate and high riks file types are stored under the registry key HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations.
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Attachments

Index