Turn off custom dictionary: registry value UserDictUserHKCU\software\policies\microsoft\ime\shared

Policy ID: L_TurnOffCustomDictionary
Scope: User Configuration
Supported on: At least Windows Server 2012, Windows 8 or Windows RT
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: Windows Components › IME

Registry

UserDict

REG_DWORDUser

HKCU\software\policies\microsoft\ime\shared 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\ime\shared]

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

CMD

:: Options (use only one)

:: Enabled
reg add "HKCU\software\policies\microsoft\ime\shared" /v "UserDict" /t REG_DWORD /d 0 /f
:: Disabled
reg add "HKCU\software\policies\microsoft\ime\shared" /v "UserDict" /t REG_DWORD /d 1 /f

PowerShell

# Common: create the key
New-Item -Path 'HKCU:\software\policies\microsoft\ime\shared' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\ime\shared' -Name 'UserDict' -PropertyType DWord -Value 0 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKCU:\software\policies\microsoft\ime\shared' -Name 'UserDict' -PropertyType DWord -Value 1 -Force | Out-Null