The WcsPlugInService service hosts third-party Windows Color System color device module and gamut map model plug-in modules. These plug-in modules are vendor-specific extensions to the Windows Color System baseline color device and gamut map modules. Stopping or disabling the WcsPlugInService service will disable this extensibility feature, and the Windows Color System will use its baseline model processing rather than the vendor's desired processing. This might result in inaccurate color rendering. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!Windows Color System (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\WcsPlugInService!Start