Grisos

"It seems there's still confusion. It is very clear from this post that for the first year it's available, you can upgrade to Windows 10 for free if you have Windows 7 or 8. You will not pay for it. After that year is up, nothing will happen to your Windows 10 license. If you do not upgrade within that year, however, you will have to pay for an upgrade. The offer expires after a year, not the upgrade." Πηγή:Microsoft: Windows 10 will not be sold as a subscription - PC Gamer