If you bought retail license of Windows 10, or got a digital product key either from Windows Store, MSDN, DreamSpark, TechNet and the likes, you obviously have a unique product key that you can enter in Windows setup during clean installations. Windows 10 retail/digital product key and activation: Clean installs will activate automatically as long as they are done on the same hardware. Your license will be tied to the hardware you upgraded Windows 10 on, not your Microsoft account.
The TL DR version of this is: If you used Windows 10 free upgrade option on a Windows 7 or 8 PC, you won’t get a unique product key.
They will show you generic product keys like TX9XD-98N7V-6WMQ6-BX7FG-H8Q99 for Windows 10 Home and VK7JG-NPHTM-C97JM-9MPGT-3V66T for Windows 10 Pro edition. You can verify this using any third-party product key fetching software like ProduKey or The Ultimate PID Checker.
Windows 10 free upgrade product key and activation from Windows 7/8: If you upgraded your PC to Windows 10 from a genuine copy of either Windows 8/8.1 or Windows 7, your license will be tied to the hardware you upgrade on, not your Microsoft account, and you won’t get any new product key either.
Wa_cq_url: "/content/Whether you availed Microsoft’s free Windows 10 upgrade offer, which by the way was available only till July 29th of 2016, or got a new license for your PC off retail, online, or via subscription-based sources like Microsoft’s own MSDN service and the likes, here’s what you need to know about Windows 10 product keys and the full process involved in activating a machine on Microsoft’s latest desktop OS.
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