Block opening of Html file types

This policy setting controls whether users can open HTML files in the specified applications.

If you enable this policy setting, users in either of the specified applications will not be able to open HTML files.

If you disable or do not configure this policy setting, PowerPoint 2007 and Word 2007 allow users to open HTML files, which usually have the following extensions:

- .htm

- .html

- .mht

- .mhtml

Supported on: At least Windows Vista
Registry HiveHKEY_CURRENT_USER
Registry PathSoftware\Policies\Microsoft\Office\12.0\PowerPoint\Security\FileOpenBlock
Value NameHtmlFiles
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

ppt12.admx

Administrative Templates (Computers)

Administrative Templates (Users)