salam admins....main ne hp laptop notebook purchase ki hai...is main genuine window huyee hai.....ab mainj us window ka backup rekhna chahta hu ta ka in future ager meri window kheraab ho jaye tou yehee window ko main dobara use ker sekuu...ye bhee beta dijye ga k ager incase kheraab ho jaye tou recover kesay keru ga.......aik aur cheez jo poochna chahta hu wo ye k win 7 k saath aik recovery drive bhee beni aatee hai is ka kya meqsed hai aur is ka faida???plz reply jeldi kijye