Windows 10 begins its global roll-out

Microsoft's Windows 10 operating system was launched July 29, 2015

Windows 10 is the most ambitious and comprehensive update in Microsoft's history and one that aims to unify different types of static and mobile devices and usher the PC firmly into the modern, connected, always-on world.

Developed based on feedback from over 5 million users as well as general criticism regarding Windows 8 and its over-zealous focus on touchscreens and mobile devices, the new version sees the return of the Start button and the addition of Cortana, a personal digital assistant who can answer questions and complete tasks via voice command.

But as well as new types of input, Windows 10 is focused on inclusion. The software comes with a host of apps focused on multimedia entertainment including Microsoft Groove, its new dedicated music service, and compatibility with OneDrive, Microsoft's cloud storage service, is backed in.

More importantly, Microsoft has recognized that the PC is just one element of the current computing landscape and so the new operating system will play nicely with other devices thanks to the Microsoft Phone Companion app. It will allow iPhone and Android smartphone owners to connect to a Windows 10 PC and move documents and files about.

There's also a completely overhauled web browser -- Microsoft Edge -- and better integration with the Xbox One games console.

"Windows 10 delivers on our more personal computing vision, with a natural, mobile and trusted experience. Along with our partners, we're excited to deliver the best Windows ever, which will empower people and organizations around the world to do great things," said Terry Myerson, executive vice president, Windows and Devices Group, at Microsoft.

The upgrade is free for the next 364 days providing your PC is running Windows 7, Windows 8 or Windows 8.1, and users that qualify will start receiving download notifications from Wednesday. However, make sure that your device is backed up, either to the cloud or an external hard drive before embarking on installation. To ensure servers don't overload, consumers will be receiving the download notification in their taskbars in waves, starting Wednesday morning. So don't panic if you've reserved a copy already but it's not yet available.