Microsoft has unveiled its initial work on the next version of the Windows operating system, calling it Windows 10. The name is a surprise; bearing in mind it represents a jump from the last version - Windows 8.
The software will run on a wide range of devices, from phones and tablets to PCs and Xbox games consoles, with applications sold from a single store. It also marks the return of the Start Menu, which had been removed from Windows 8.
The menu also brings up resizable tile, similar to those featured in Windows 8's touch-centric interface on PCs and tablets. These provide a quick view of notifications from relevant applications, such as details of new emails, Facebook messages and weather forecast updates.