Windows 10 upgrade is still free if you have a valid Windows 7 or 8.1 product key

People who still want to get Windows 10 for free can take advantage of a loophole that allows users to get the OS if they already have a valid product key for Windows 7 or 8.1.

http://feedproxy.google.com/~r/wmexperts/~3/E0GkDhIACZA/windows-10-still-free-if-you-have-valid-windows-7-or-81-product-key