As many of you know, today is the end of the road for Windows 7 and security updates will no longer be available for Windows 7. For those who are still running Windows 7, I would recommend upgrading to Windows 10 as soon as possible which will mainly cost you $129.99-139.99 for Windows 10 Home and $199.99 for Windows 10 Pro.
Existing Product Keys for Windows 7
If you already have Windows 7 and you have a product key lying around at the back of a desktop or a laptop, apparently you can use this product key to do a clean install, instead of doing an upgrade. You can do so without any issues whatsoever. So no need to go out and purchase a Windows 10 product key.
Upgrade to Windows 10 for Free
The other option to get Windows 10 for free is to go and download the tool itself and it will try and verify if the hardware is compatible and if it is, it will then upgrade your existing Windows 7 to Windows 10 automatically without purchasing a license as well. This is what you call a digital licensing.