my laptop came with preloaded windows8 single language... i reinstalled win7 and ubuntu13.10, lost the recovery partition(haven't burnt recovery partition into disks). i want to upgrade now to win8, i don't have installation disk. my frnd have the same laptop with same configurations except external graphic card(his laptop doesn't have, but my laptop has 1gb external nvidia). can i use his recovery partition to get back win8. if so, will the recovery media takes product key from bios of my laptop or not(as all win8 preloaded laptops are coming with product key in bios).
thanks in advance