Here we go again: Is Windows 10 Free? Yes, and No. An Explainer
Microsoft is set to release Windows 10 on July 29th and users of current versions of the operating system will get an upgrade free of charge. So where's the confusion? Microsoft has sent mixed signals (more than once) and speculation has built on top of that about who gets the free upgrade and who doesn't, if Insiders get a free pass or not. Here's an overview of the different upgrade paths to Windows 10 that explains it all.