Enumeration policy for external devices incompatible with Kernel DMA Protection: registry value DeviceEnumerationPolicyComputerHKLM\Software\Policies\Microsoft\Windows\Kernel DMA Protection

Policy ID: DmaGuardEnumerationPolicy
Scope: Computer Configuration
Supported on: At least Windows Server 2016, Windows 10
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: System › Kernel DMA Protection

Registry

DeviceEnumerationPolicy

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows\Kernel DMA Protection Current key

Enabled value: Depends on the option value
Element: Enumeration policy

Options
Item	Stored value
Block all	0
Only while logged in (default)	1
Allow all	2

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\Kernel DMA Protection]

; Options (use only one)
; Block all
"DeviceEnumerationPolicy"=dword:00000000
; Only while logged in (default)
"DeviceEnumerationPolicy"=dword:00000001
; Allow all
"DeviceEnumerationPolicy"=dword:00000002

CMD

:: Options (use only one)

:: Block all
reg add "HKLM\Software\Policies\Microsoft\Windows\Kernel DMA Protection" /v "DeviceEnumerationPolicy" /t REG_DWORD /d 0 /f
:: Only while logged in (default)
reg add "HKLM\Software\Policies\Microsoft\Windows\Kernel DMA Protection" /v "DeviceEnumerationPolicy" /t REG_DWORD /d 1 /f
:: Allow all
reg add "HKLM\Software\Policies\Microsoft\Windows\Kernel DMA Protection" /v "DeviceEnumerationPolicy" /t REG_DWORD /d 2 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows\Kernel DMA Protection' -Force | Out-Null

# Options (use only one)
# Block all
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\Kernel DMA Protection' -Name 'DeviceEnumerationPolicy' -PropertyType DWord -Value 0 -Force | Out-Null
# Only while logged in (default)
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\Kernel DMA Protection' -Name 'DeviceEnumerationPolicy' -PropertyType DWord -Value 1 -Force | Out-Null
# Allow all
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows\Kernel DMA Protection' -Name 'DeviceEnumerationPolicy' -PropertyType DWord -Value 2 -Force | Out-Null