Windows 10 is a free upgrade for existing Windows customers

So i'm very excited to announce, that for the first year after Windows 10 is available, we'll be making available a free upgrade to Windows 10 to all devices running Windows 8.1. And. We will also be making available, free upgrades of Windows 10, to all devices running Windows Phone 8.1. And last, but not least. For the first year after Windows 10 is available, we will be making available, a free upgrade, to all of our customers still running Windows 7.