Windows 10 available as a free upgrade from July 29, 2015

Microsoft is making Windows 10 available as a free upgrade for qualified Windows 7, Windows 8.1, and Windows Phone 8.1 devices. It will be available starting July 29, 2015; people can reserve their free upgrade today.

You only have until July 29, 2016 to take advantage of this offer. Once you upgrade, you have Windows 10 for free on that device.
Dovedale Computers can provide advice, help you upgrade your devices and provide training.  (Fee's and conditions apply)