Can I reinstall Windows 10 on my computer after upgrading?
Yes. 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. To learn more, click here.