Set the retention period for files in the local device control cache: registry value DataDuplicationLocalRetentionPeriodComputerHKLM\Software\Policies\Microsoft\Windows Defender\Device Control

Policy ID: DeviceControl_DataDuplicationLocalRetentionPeriod
Scope: Computer Configuration
Supported on: At least Windows Server 2016, Windows 10 Version 1607
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Microsoft Defender Antivirus › Device Control

Registry

DataDuplicationLocalRetentionPeriod

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows Defender\Device Control Current key

Enabled value: Depends on the option value
Element: Set the retention period for files in the local device control cache
Value type: REG_DWORD
Minimum value: 0
Maximum value: 10000
Required: true

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows Defender\Device Control]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"DataDuplicationLocalRetentionPeriod"=dword:<enter value>

CMD

:: Value names and types follow the ADMX. Replace <enter value> below with your own data

reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Device Control" /v "DataDuplicationLocalRetentionPeriod" /t REG_DWORD /d "<enter value>" /f

PowerShell

# Value names and types follow the ADMX. Replace <enter value> below with your own data

New-Item -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\Device Control' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows Defender\Device Control' -Name 'DataDuplicationLocalRetentionPeriod' -PropertyType DWord -Value '<enter value>' -Force | Out-Null