Policy
Turn on 64-bit tab processes when running in Enhanced Protected Mode on 64-bit versions of Windows
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.
2d8551986a46 Advanced_EnableEnhancedProtectedMode64Bit Registry
Copy registry mappings
HKLM\Software\Policies\Microsoft\Internet Explorer\Main\Isolation64Bit (enabled) = 1
HKLM\Software\Policies\Microsoft\Internet Explorer\Main\Isolation64Bit (disabled) = 0HKCU\Software\Policies\Microsoft\Internet Explorer\Main\Isolation64Bit (enabled) = 1
HKCU\Software\Policies\Microsoft\Internet Explorer\Main\Isolation64Bit (disabled) = 0Policy notes
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.