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#1
Hey mate,
When you upgrade with the free reserved copy from the GWX app on an activated Windows 7 or 8.1 PC, Windows 10 has a generic key included that will activate it.
If you clean or upgrade install Windows 10 without doing the above first, Windows 10 will not be activated.
Can I reinstall Windows 10 on my computer after upgrading with free upgrade?
Once you’ve upgraded to Windows 10 using the free upgrade offer, you will be able to reinstall, including a clean install, on the same device. You won’t need a product key for re-activations on the same hardware. If you make a meaningful change to your hardware, you may need to contact customer support to help with activation. You’ll also be able to create your own installation media like a USB drive or DVD, and use that to upgrade your device or reinstall after you’ve upgraded.