Select cloud protection level: registry value MpCloudBlockLevelComputerHKLM\Software\Policies\Microsoft\Windows Defender\MpEngine
- Policy ID
- MpEngine_MpCloudBlockLevel
- 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
- Windows Components › Microsoft Defender Antivirus › MpEngine
Registry
MpCloudBlockLevel
-ComputerMpCloudBlockLevel
REG_DWORDComputer- Enabled value
- Depends on the option value
- Element
- Select cloud blocking level
| Item | Stored value |
|---|---|
| Default blocking level | 0 |
| Moderate blocking level | 1 |
| High blocking level | 2 |
| High+ blocking level | 4 |
| Zero tolerance blocking level | 6 |
Apply with .reg · CMD · PowerShell
.reg
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\MpEngine] ; Options (use only one) ; Default blocking level "MpCloudBlockLevel"=dword:00000000 ; Moderate blocking level "MpCloudBlockLevel"=dword:00000001 ; High blocking level "MpCloudBlockLevel"=dword:00000002 ; High+ blocking level "MpCloudBlockLevel"=dword:00000004 ; Zero tolerance blocking level "MpCloudBlockLevel"=dword:00000006
CMD
:: Options (use only one) :: Default blocking level reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpCloudBlockLevel" /t REG_DWORD /d 0 /f :: Moderate blocking level reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpCloudBlockLevel" /t REG_DWORD /d 1 /f :: High blocking level reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpCloudBlockLevel" /t REG_DWORD /d 2 /f :: High+ blocking level reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpCloudBlockLevel" /t REG_DWORD /d 4 /f :: Zero tolerance blocking level reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpCloudBlockLevel" /t REG_DWORD /d 6 /f
PowerShell
# Common: create the key New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Force | Out-Null # Options (use only one) # Default blocking level New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpCloudBlockLevel' -PropertyType DWord -Value 0 -Force | Out-Null # Moderate blocking level New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpCloudBlockLevel' -PropertyType DWord -Value 1 -Force | Out-Null # High blocking level New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpCloudBlockLevel' -PropertyType DWord -Value 2 -Force | Out-Null # High+ blocking level New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpCloudBlockLevel' -PropertyType DWord -Value 4 -Force | Out-Null # Zero tolerance blocking level New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\MpEngine' -Name 'MpCloudBlockLevel' -PropertyType DWord -Value 6 -Force | Out-Null