Turn off the Windows Messenger Customer Experience Improvement Program: registry value CEIP (HKLM Client)ComputerHKLM\Software\Policies\Microsoft\Messenger\Client

Policy ID: WinMSG_NoInstrumentation_2
Scope: Computer Configuration
Supported on: At least Windows Server 2003 operating systems or Windows XP Professional with SP2
Source: Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
Category: System › Internet Communication Management › Internet Communication settings

Registry

CEIP

REG_DWORDComputer

HKLM\Software\Policies\Microsoft\Messenger\Client Current key

Enabled value: 2
Disabled value: 1

Apply with .reg · CMD · PowerShell

.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Messenger\Client]

; Options (use only one)
; Enabled
"CEIP"=dword:00000002
; Disabled
"CEIP"=dword:00000001

CMD

:: Options (use only one)

:: Enabled
reg add "HKLM\Software\Policies\Microsoft\Messenger\Client" /v "CEIP" /t REG_DWORD /d 2 /f
:: Disabled
reg add "HKLM\Software\Policies\Microsoft\Messenger\Client" /v "CEIP" /t REG_DWORD /d 1 /f

PowerShell

# Common: create the key
New-Item -Path 'HKLM:\Software\Policies\Microsoft\Messenger\Client' -Force | Out-Null

# Options (use only one)
# Enabled
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Messenger\Client' -Name 'CEIP' -PropertyType DWord -Value 2 -Force | Out-Null
# Disabled
New-ItemProperty -Path 'HKLM:\Software\Policies\Microsoft\Messenger\Client' -Name 'CEIP' -PropertyType DWord -Value 1 -Force | Out-Null