Disk Defragmenter: registry value Restrict_RunUserHKCU\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5}

Policy ID: MMC_DiskDefrag
Scope: User Configuration
Supported on: At least Windows 2000
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › Microsoft Management Console › Restricted/Permitted snap-ins

Registry

Restrict_Run

REG_DWORDUser

HKCU\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5} Current key

Enabled value: 0
Disabled value: 1

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5}]

; Options (use only one)
; Enabled
"Restrict_Run"=dword:00000000
; Disabled
"Restrict_Run"=dword:00000001

CMD

:: Options (use only one)

:: Enabled
reg add "HKCU\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5}" /v "Restrict_Run" /t REG_DWORD /d 0 /f
:: Disabled
reg add "HKCU\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5}" /v "Restrict_Run" /t REG_DWORD /d 1 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5}' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5}' -Name 'Restrict_Run' -PropertyType DWord -Value 0 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKCU:\Software\Policies\Microsoft\MMC\{43668E21-2636-11D1-A1CE-0080C88593A5}' -Name 'Restrict_Run' -PropertyType DWord -Value 1 -Force | Out-Null