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#21
I have Technet keys for both Win 7 Ultimate and Win 8.1 pro and have been running them for a very long time. Both have the Reserve Windows 10 icon and have a confirmed reservation. The Technet keys were for testing however they are good forever with the computer that they are assigned. I also have been running Office 2010 on one machine and Office 2013 on another. These are all valid keys.