All Processes

Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1

Registry

HKLM Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING

HKCU Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_MIME_SNIFFING

Value name: *

Enabled: * = 1

Disabled: * = 0

Description

This policy setting determines whether Internet Explorer MIME sniffing will prevent promotion of a file of one type to a more dangerous file type. If you enable this policy setting, the Mime Sniffing Safety Feature is enabled for all processes. If you disable or do not configure this policy setting, the Mime Sniffing Safety Feature is disabled for all processes.