I know the upgrade itself from W7 or W8 is "free", however there is some information on the web stating that Windows 10 may have a yearly subscription or a payment in the future, similar to the Office 365 subscription. Is this true?
Furthermore the wording on the Windows 10 website's small-print is very carefully constructed, for example "Once you upgrade, you have Windows 10 for free on that device." however this does not clear up whether there will be any payment(s) in the future.
My question therefore is if Windows 10 will be free for life or is just free to upgrade initially?