563936, RE: Product Key Posted by jbmcmillan, Thu Mar-02-17 10:46 PM
Because they are just placeholders it's done on a hardware id when you upgraded.Stored on M$ servers the only time you need a key is when it is clean installed on a machine that never had it installed before.You can install without a key and phone them to activate if you change motherboards for example but be prepared to spend some time on the phone mine took over an hour.
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