A few days ago the manager of the Windows 10 Beta Testers program from Windows Insiders said that they would be able to upgrade to the final version. After he was asked again, this time via Twitter, he said that in order for this to work you will need a Windows 7 or Windows 8.1 license, meaning that it won’t work with previous versions such as XP or Vista.
It is in line with the previous Microsoft comments regarding the free Windows 10 upgrade for those users who already have Windows 7 or 8 installed on their PCs. Previously it has been mentioned that non original copies (used without a valid license [pirated copies]) will also be able to upgrade to Windows 10, although that doesn’t mean they will become legal copies.
Microsoft will turned a blind eye at first with the pirated copies so that the maximum number of users can upgrade to Windows 10. This is because Windows Store and other Microsoft services included (Office 365 or OneDrive) are the financing sources that the company wants to promote towards the future.