Windows 10 Rollout Launch Information

Microsoft is on course to release Windows 10 later this summer, and instead of dropping the OS upgrade simultaneously across all systems, they’ll be going for a roll-out-style launch. Devices running Windows 7 Service Pack 1 or Windows 8.1 will be able to upgrade for free once the launch occurs, followed by other devices later in the cycle:

http://www.zdnet.com/article/windows-10s-summer-launch-date-is-first-step-in-a-slow-roll-out