Watch the Windows 10 launch live

Microsoft promises a 'new chapter' with the latest version of Windows

The Windows 10 product family (Microsoft)

Microsoft is ready to launch Windows 10, its latest rejiggle of the most ubiquitous operating systems, with many awaiting the return of the ever-popular Start Menu.

• Event will be livestreamed, beginning at 5PM GMT, from Microsoft’s home in Washington
• First major update since the widely-disliked Windows 8 — Microsoft missed Windows 9 out entirely, for reasons that are still slightly unclear
• The start menu is set to return, after protests from users
• New operating system expected to include new streamlined browser, codenamed Spartan
• Voice assistant, known as Cortana, also expected to make its desktop debut
• Microsoft expected to outline its hopes for one platform — a new Windows that will work on the tiniest phones to the biggest TVs
• Gaming updates set to be announced with a guest appearance by the head of Xbox. Phil Spencer who runs the gaming division has said that the company hopes to announce the “best operating system we’ve ever created for gamers”

Windows 10 is due to launch later this year but it's unclear how much it will cost.