15/01/22 20:15:59.16 JaQkRpXJ!
It will also be free to upgrade from Windows 7 to Windows 10 in the first year of release (the upgrade is of course permanent).
Probably the reason why it will be free is because Windows 10 has the Windows Store in it, and Windows 7 doesn't.
Upgrading from Windows 8 (or 8.1) to Windows 10 will always be free.
URLﾘﾝｸ(blogs.windows.com)