Microsoft will release the Windows 10 operating system by late summer or early fall in 2015.

Recently, Kevin Turner, Microsoft Chief Operating Officer at the Annual Technology Conference on 4 December, offered more details on Windows 10.

Turner confirms again Microsoft's plan to talk about the Windows 10 end-user consumer experience in early spring next year. And that the company will have a developer preview sometime in early summer.

This will be followed by the Windows 10 release by either late summer or early fall in 2015.

The thing I want to tell you about on Windows 10 is in the Windows 10 time frame, which we plan to talk about the end-user consumer experiences in the early spring, we'll have a developer preview and be able to talk to that in depth in the early summer time frame. And then by next late summer and early fall we'll be able to bring out this particular OS. That's the current plan of record.

The timeline shared by Turner matches with the one that Microsoft's Operating Systems Group chief, Terry Myerson mentioned while introducing the Windows 10 on 30 September, which says;

This week's announcements are just the first chapter of our conversation with customers about Windows 10 – with a focus on enterprise features (because enterprises have a need to evaluate software early on) and the desktop/laptop experiences. Early in 2015 we'll introduce the consumer chapter and talk much more about other device types and more consumer features. We'll then continue the conversation with the developer chapter at our Build conference, and later in the year we'll release Windows 10 and look forward to some amazing new devices.

As for the Windows 10 Technical Preview, the next update to the preview version will be known as the January Technical Preview (JTP), rather than the consumer preview, according to sources well versed with internal Windows information, reports ZDNet. This will be followed by a February Tech Preview and a March Tech Preview.

Besides, the company will bring the first preview of Windows 10 mobile SKU that will work on Windows Phones, ARM and Intel tablets in late January.