Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
Verified with Windows 11 25H2 — updated on July 30, 2026
Supported on: At least Internet Explorer 11.0
Path in the GPO console
Computer Configuration\Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel\Advanced Page User Configuration\Administrative Templates\Windows Components\Internet Explorer\Internet Control Panel\Advanced Page Description
This policy setting determines whether Internet Explorer 11 uses 64-bit processes (for greater security) or 32-bit processes (for greater compatibility) when running in Enhanced Protected Mode on 64-bit versions of Windows. Important: Some ActiveX controls and toolbars may not be available when 64-bit processes are used. If you enable this policy setting, Internet Explorer 11 will use 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows. If you disable this policy setting, Internet Explorer 11 will use 32-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows. If you don't configure this policy setting, users can turn this feature on or off using Internet Explorer settings. This feature is turned off by default.
Registry
Software\Policies\Microsoft\Internet Explorer\Main Software\Policies\Microsoft\Internet Explorer\Main Value name: Isolation64Bit
Enabled: Isolation64Bit = 1
Disabled: Isolation64Bit = 0
MDM / Intune (CSP)
./Device/Vendor/MSFT/Policy/Config/InternetExplorer/DisableProcessesInEnhancedProtectedMode ./User/Vendor/MSFT/Policy/Config/InternetExplorer/DisableProcessesInEnhancedProtectedMode 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: Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
; State: Enabled
; Scope: Computer (HKLM)
; Supported on: At least Internet Explorer 11.0
[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Internet Explorer\Main]
"Isolation64Bit"=dword:00000001More formats (PowerShell, Intune, SCCM)
PowerShell
# Exported from gporais.com
# Policy: Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 11.0
$path = 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'Isolation64Bit' -Value 1 -Type DWordIntune XML
OMA-URI: ./Device/Vendor/MSFT/Policy/Config/InternetExplorer/DisableProcessesInEnhancedProtectedMode
Data type: String
Value:
<enabled/>Intune Remediation
# === Detection script ===
# Exported from gporais.com
# Policy: Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 11.0
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main' -Name 'Isolation64Bit' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 11.0
$path = 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'Isolation64Bit' -Value 1 -Type DWordSCCM scripts
# Exported from gporais.com
# Policy: Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 11.0
# 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: Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 11.0
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
}
$checks = @(
(Test-RegistryValue -Path 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main' -Name 'Isolation64Bit' -Expected 1 -Kind DWord)
)
if ($checks -notcontains $false) {
Write-Output 'Compliant'
exit 0
}
Write-Output 'Non-compliant'
exit 1
# === Remediation script ===
# Exported from gporais.com
# Policy: Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
# State: Enabled
# Scope: Computer (HKLM)
# Supported on: At least Internet Explorer 11.0
$path = 'HKLM:\Software\Policies\Microsoft\Internet Explorer\Main'
New-Item -Path $path -Force | Out-Null
Set-ItemProperty -Path $path -Name 'Isolation64Bit' -Value 1 -Type DWordBuilding a multi-setting collection? Add this setting and generate combined .reg / PowerShell / GPO scripts.