How Windows 8 speeds down shutdown

Win8 shutdown speed than the previous system has been a certain degree of improvement, but still have friends on the Win8 shutdown speed is not too satisfied. The best method of course is to replace the solid state drive, but not through the replacement of hardware, only through Group Policy settings. Small set recommend that the small partners that refer to this method do not forget to save important documents before shutting down the computer. Do you need ___ seconds to turn off your computer?