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 Hive | HKEY_LOCAL_MACHINE or HKEY_CURRENT_USER |
| Registry Path | Software\Policies\Microsoft\Internet Explorer\Main |
| Value Name | Isolation64Bit |
| Value Type | REG_DWORD |
| Enabled Value | 1 |
| Disabled Value | 0 |