This policy setting controls the Start background visuals. If you enable this policy setting, the Start background will use a solid color. If you disable or do not configure this policy setting, the Start background will use the default visuals. Note: If this policy setting is enabled, users can continue to select a color in Start Personalization. However, setting the accent will have no effect. Fix: (1) GPO: Computer Configuration\Administrative Templates\Windows Components\Desktop Window Manager!Use solid color for Start background (2) REG: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\DWM!DisableAccentGradient