same purchased 10 pcs from HP and no Win 8 key . Said its in recovery partition . asked the same question to HP dealer then customer care that if due to virus the recovery partition is corrupted then what to do . The answer was unbelievable - call MS . I was surprised and blasted him that when invoice reads pre loaded OS I want my Win 8 key . So what to do except using this keyfinder . Key finder is not recommended because finally there will be 200 PCs and doing the key finder thing on 200 PCs will be a pain