Wasted 6 hours trying to enter the Microsoft Windows 10 Product Key which is attached to the machine itself.Due to so many failed attempts I actually lost my MS account and now am in the process trying to explain to the MS robots what happened.I have since learned that this is a very common problem when using refurbs and product keys.Still a Amazon lover but learned the old adage that you get what you paid for.In this case, not even that amount.