Today on stage at the Windows 10 event, Microsoft announced that customers running Windows 7, Windows 8.1, and Windows Phone 8.1 will all be eligible for free upgrades to Windows 10. Free upgrades will be available to users running those systems for the first year of Windows 10, and users will get updates for the supported lifetime of their device.
Microsoft also announced several upgrade numbers. About 200 million users upgraded to Windows 8.1. Additionally, over 650 million customers upgraded from Windows 7 to Windows 7 SP1.
Be sure to stay tuned to our Windows 10 event liveblog for more.