The Do not allow color changes machine setting should be configured correctly. This policy setting controls the ability to change the color of window frames. If you enable this policy setting, you prevent users from changing the default window frame color. If you disable or do not configure this policy setting, you allow users to change the default window frame color. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Desktop Window Manager\Window Frame Coloring\Do not allow color changes (2) KEY: HKLM\SOFTWARE\Policies\Microsoft\Windows\DWM\DisallowColorizationColorChanges