NOW I'll call it free Windows 10 upgrade. Great news like emoticon

How To Activate Windows 10 Using Windows 7 or 8.1 Product Key Right Now

Microsoft has finally responded to the user feedback in the form of recognizing…

for more ditail click on the given link http://fossbytes.com/how-to-activate-windows-10-using-windows-7-or-8-1-product-key/