All Processes
- Policy ID
- IESF_PolicyAllProcesses_3
- Scope
- Computer Configuration, User Configuration
- Supported on
- At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Windows Components › Internet Explorer › Security Features › MK Protocol Security Restriction
Description
The MK Protocol Security Restriction policy setting reduces attack surface area by preventing the MK protocol. Resources hosted on the MK protocol will fail.
If you enable this policy setting, the MK Protocol is disabled for all processes. Any use of the MK Protocol is blocked.
If you disable or do not configure this policy setting, the MK Protocol is enabled.
Registry
ComputerHKEY_LOCAL_MACHINE
HKLM\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL View registry values
- *REG_SZ
UserHKEY_CURRENT_USER
HKCU\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL View registry values
- *REG_SZ