I know the different capabilities of W8.1 and W8.1 Pro. Anyway, a friend wants to sell me an activation key for Windows 8.1 Pro but I have Windows(R) and its description says RETAIL channel, it means I have Windows 8.1 (not the Pro version). The question is: can I activate my windows 8.1 with that key for windows 8.1 Pro?

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    They are indeed different. You can upgrade from Windows 8.1 to Windows 8.1 Professional – Ramhound Jul 28 '16 at 3:00
  • yes, I did it, no problem. – JoeCoolman Jul 29 '16 at 2:12

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