Microsoft has announced that it in addition to offering free upgrades for current licenced copies of Windows 8 and Windows 7, it will offer the upgrade to users of non-genuine Windows as well. In an effort to bring all desktops in the world to Windows, it made the policy change. What is interesting is that it gives away the upgrade, it will keep track of genuine and non-genuine copies. Not sure what implications this will have for users of the operating system that acquired previous versions by other means, oh hmmm..
parts of this post from ZDNet article: http://www.zdnet.com/article/windows-10-to-launch-this-summer-with-free-upgrades-for-pirated-copies/