Limit Windows File Protection cache size: registry value SfcQuotaComputerHKLM\Software\Policies\Microsoft\Windows NT\Windows File Protection

Policy ID: WFPQuota
Scope: Computer Configuration
Supported on: Windows Server 2003, Windows XP, and Windows 2000 only
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: System › Windows File Protection

Registry

SfcQuota

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Windows NT\Windows File Protection Current key

Enabled value: Depends on the option value
Element: Cache size (in MB)
Value type: REG_DWORD
Maximum value: 4294967295

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\Windows File Protection]

; Value names and types follow the ADMX. Replace <enter value> below with your own data
"SfcQuota"=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 NT\Windows File Protection" /v "SfcQuota" /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 NT\Windows File Protection' -Force | Out-Null
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Windows NT\Windows File Protection' -Name 'SfcQuota' -PropertyType DWord -Value '<enter value>' -Force | Out-Null