Internet Explorer places restrictions on each Web page it opens. The restrictions are dependent upon the location of the Web page (Internet Intranet Local Machine zone etc.). Web pages on the local computer have the fewest security restrictions and reside in the Local Machine zone making the Local Machine security zone a prime target for malicious users. Zone Elevation also disables JavaScript navigation if there is no security context.If you enable this policy setting any zone can be protected from zone elevation by Internet Explorer processes.If you disable this policy setting no zone receives such protection for Internet Explorer processes.If you do not configure this policy setting any zone can be protected from zone elevation by Internet Explorer processes.
Windows Components\Internet Explorer\Security Features\Protection From Zone Elevation
Machine
At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
HKLM\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ZONE_ELEVATION!(Reserved) HKLM\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ZONE_ELEVATION!explorer.exe HKLM\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_ZONE_ELEVATION!iexplore.exe
inetres.admx