system reserve yan tol, dapat nakahide yan...diyan nilalagay ng OS yun info about sa Masterboot records at system partition ng drive mo..siguro nagformat ka then di ka gumawa ng bagong or dinelete yun lumang system reserve...100 mb lang yan tol so meaning yun drive D: mo ay maaring nadelete mo yung partition or nakahide o walang drive letter yun partition na pinaglalagyan ng mga files mo...kaya din lumalabas yan system reserve eh baka na alter or nagalaw yun MBR mo kaya lumabas yun "This Copy Of Windows Is Not Genuine Error " kasi dun naka base din sa MBR which nasa system reserve kung activated ba OS mo or hindi..