Windows 8/8.1 All Editions Universal Product Keys collection.Compare Windows 7 All Editions’ full features.Hope this list can bring convenience when you want to roll back to Windows 7 (the Windows 10 after Windows 8.1 reminded me of the Windows Vista after Windows XP – advanced, beautiful, cool, but… Just hope Windows 10.1 can be better than Windows 8.1). Here for everybody, AppNee collected almost the every Product Key (also called installation serial numbers) for all editions of Windows 7. They are manifold but not disorderly mixed, because I have tried our best to make them orderly, maybe still need you to pay some patience when finding. For AppNee, I have a performance list for Windows Pro Editions, that’s: 98 > XP > 8.1 > 7 > 8 > 10 > Vista. I guess for many guys who pursue the performance and have tried Windows 8/8.1 or even the latest Windows 10, they found they like Windows 7 better, or even want to change back to Window 7.