have a dell inspiron n5010 and I started a system restore to factory defaults.. I interrupted it at 51% by shutting it down.. When I switched on the laptop, it showed system auto repair, through which I again started restore through dell datasafe backup, and guess what.. It showed the same.. 51% and not a single percent every time I do this.. Should I reinstall windows?? I have the disc just advice me how to do. Please I do not have time my exams are near I need my laptop.. Please