Microsoft's highly anticipated Windows 10 launched this morning. The new operating system works across desktops, laptops and tablets; versions for other devices, such as smartphones and Microsoft's Hololens (an augmented reality headset), will come later this year. The push will mark a significant step for Microsoft toward influencing the mobile and web arena, currently dominated by Apple, Google and Amazon.
Windows 10 is the first next-generation OS since their Windows 8 launch three years ago, which caught some heat from loyal users when they ditched the start button menu and introduced a new layout. Windows 10 reintroduces the start button and Microsoft's new browser, Edge. Current users of Windows 7, Windows 8.1 and Windows Phone 8.1 are eligible for a free upgrade.