Prevent changing visual style for windows and buttons: registry value NoVisualStyleChoiceUserHKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System

Policy ID
CPL_Personalization_DisableVisualStyle
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

Registry

NoVisualStyleChoice

-User