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Long ago, and with a different version, I had some trouble with a MS Windows license. As it turned out, I had a product that was validly installed via an OEM key that had since expired. It was later disabled by MS because it was being used 'fraudulently' . Also, it could only be used on OEM versions and OEM versions could only use OEM keys.
In my case, I had a valid MSDN key to reactivate it but it was rejected. There were all sorts of unpleasant problems, but only after it went bad and I needed to reactivate it.
".45 ACP - because shooting twice is just silly" - JSOP, 2010 ----- You can never have too much ammo - unless you're swimming, or on fire. - JSOP, 2010 ----- When you pry the gun from my cold dead hands, be careful - the barrel will be very hot. - JSOP, 2013