Prevent changing theme: registry value NoThemesTabUserHKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer
- Policy ID
- CPL_Personalization_DisableThemeChange
- Scope
- User Configuration
- Supported on
- At least Windows Server 2003 operating systems or Windows XP Professional
- Source
- Administrative Templates (.admx) for Windows 11 2026 Update (26H2) (version 1.0)
- Category
- Control Panel › Personalization