Internet Explorer Processes
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Security Features\MK Protocol Security Restriction User Configuration\Administrative Templates\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 prevented for File Explorer and Internet Explorer, and resources hosted on the MK protocol will fail. If you disable this policy setting, applications can use the MK protocol API. Resources hosted on the MK protocol will work for the File Explorer and Internet Explorer processes. If you do not configure this policy setting, the MK Protocol is prevented for File Explorer and Internet Explorer, and resources hosted on the MK protocol will fail.
Registry
HKLM
Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL HKCU
Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL This policy sets several registry values:
(Reserved) Enabled:
(Reserved) = 1 Disabled:
(Reserved) = 0 explorer.exe Enabled:
explorer.exe = 1 Disabled:
explorer.exe = 0 iexplore.exe Enabled:
iexplore.exe = 1 Disabled:
iexplore.exe = 0 MDM / Intune (CSP)
Device
./Device/Vendor/MSFT/Policy/Config/InternetExplorer/MKProtocolSecurityRestrictionInternetExplorerProcesses User
./User/Vendor/MSFT/Policy/Config/InternetExplorer/MKProtocolSecurityRestrictionInternetExplorerProcesses Microsoft Learn documentation Mapping data: Microsoft Learn (CC BY 4.0)
Export Builder
BETAConfigure the state, scope and options, then generate .reg, PowerShell, Intune and SCCM outputs — or add the setting to a multi-setting collection.
These exports write the registry — this is not a managed GPO. ⓘ
Applying both scopes creates an ambiguous configuration (computer takes precedence over user). Only do this intentionally.
.reg file
Windows Registry Editor Version 5.00
; Exported from gporais.com
; Policy: Internet Explorer Processes
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL]
"(Reserved)"="1"
"explorer.exe"="1"
"iexplore.exe"="1"More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Internet Explorer Processes
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
$path = 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name '(Reserved)' -Value '1' -Type String
Set-ItemProperty -Path $path -Name 'explorer.exe' -Value '1' -Type String
Set-ItemProperty -Path $path -Name 'iexplore.exe' -Value '1' -Type StringIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/InternetExplorer/MKProtocolSecurityRestrictionInternetExplorerProcesses
Data type: String
Value:
<enabled/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Internet Explorer Processes
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL' -Name '(Reserved)' -Expected '1' -Kind String)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL' -Name 'explorer.exe' -Expected '1' -Kind String)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL' -Name 'iexplore.exe' -Expected '1' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Internet Explorer Processes
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
$path = 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name '(Reserved)' -Value '1' -Type String
Set-ItemProperty -Path $path -Name 'explorer.exe' -Value '1' -Type String
Set-ItemProperty -Path $path -Name 'iexplore.exe' -Value '1' -Type StringSCCM scripts
# Exported from gporais.com
# Policy: Internet Explorer Processes
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
# SCCM Configuration Item guidance:
# Create a Configuration Item of type "Setting: Script".
# Discovery script: use the Detection script below.
# Remediation script: use the Remediation script below.
# Compliance rule: the Discovery script output equals 'Compliant'.
# === Detection script ===
# Exported from gporais.com
# Policy: Internet Explorer Processes
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
function Test-RegistryValue {
param(
[Parameter(Mandatory = $true)][string]$Path,
[Parameter(Mandatory = $true)][string]$Name,
[object]$Expected,
[ValidateSet('String', 'DWord', 'MultiString')][string]$Kind = 'String',
[switch]$Absent
)
try {
$item = Get-ItemProperty -LiteralPath $Path -Name $Name -ErrorAction Stop
} catch {
return $Absent.IsPresent
}
if ($Absent.IsPresent) { return $false }
$actual = $item.$Name
if ($Kind -eq 'DWord') { return ([int64]$actual) -eq ([int64]$Expected) }
if ($Kind -eq 'MultiString') {
$actualValues = @($actual)
$expectedValues = @($Expected)
if ($actualValues.Count -ne $expectedValues.Count) { return $false }
for ($i = 0; $i -lt $expectedValues.Count; $i++) {
if ([string]$actualValues[$i] -ne [string]$expectedValues[$i]) { return $false }
}
return $true
}
return [string]$actual -eq [string]$Expected
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL' -Name '(Reserved)' -Expected '1' -Kind String)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL' -Name 'explorer.exe' -Expected '1' -Kind String)
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL' -Name 'iexplore.exe' -Expected '1' -Kind String)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Internet Explorer Processes
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 6.0 in Windows XP with Service Pack 2 or Windows Server 2003 with Service Pack 1
$path = 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_DISABLE_MK_PROTOCOL'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name '(Reserved)' -Value '1' -Type String
Set-ItemProperty -Path $path -Name 'explorer.exe' -Value '1' -Type String
Set-ItemProperty -Path $path -Name 'iexplore.exe' -Value '1' -Type StringBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.