Microsoft has officially announced the release date for the final RTM build of Windows 10, the next version of Windows NT family of operating system which Microsoft intends to use to unify the seamless user experience and share a common application architecture and ecosystem through Windows Store Universal apps across desktop, laptop, tablet, smartphone, Xbox One gaming console, IoT (Internet of Things through Windows Embedded) and other product categories such as the Surface Hub and HoloLens, and bring back the familiar experience to Windows 7 users.

According to Terry Myerson, EVP of Operating Systems in Microsoft, Windows 10 will be available this summer in 190 countries and 111 languages. That put the official general availability (GA) date of Windows 10 to anytime in June, July, August and first week of September in 2015. The release date is the most specific by far ever announced by Microsoft, and significantly earlier than “later half of 2015” announced by Microsoft before now. The new date range effectively means that Windows 10 RTM will be available by mid 2015, by official release or leak.

The simultaneous release in 190 countries and 111 languages also means that Windows 10 will instantly available for almost everyone worldwide at the same time. Though we believe a leaked build of RTM version of Windows 10 may still happen before GA.

The announcement was made in conjunction with a speech Tuesday, March 17, 2015 at the Windows Hardware Engineering Community (WinHEC) summit in Shenzhen, China. The summit also showcases new features on Windows 10, such as Windows Hello, which provides instant access to your devices through biometric authentication – using your face, iris or fingerprint to unlock your devices, supported by third-party systems incorporating fingerprint reader, illuminated IR Sensor and couple of other biometric sensors such as Intel’s RealSense, a depth-sensing technology that uses infrared cameras to track the location and position of objects in space. In addition, Microsoft Passport will act like a single password based gateway to securely authenticate the access to different websites, networks and web apps without having to entering credentials again and again.

Not forgotten is Windows for small footprint IoT, which will be available for free, and the availability of Qualcomm DragonBoard 410C, the first Windows 10 developer board with integrated Wi-Fi, Bluetooth and GPS, and a smartphone-class Snapdragon 410 chipset.

Microsoft will also partner with Lenovo, Tencent and Qihu 360 to offer free Windows 10 upgrade service to their users, while Xiaomi will release Windows 10 to select Mi 4 power users.

Microsoft has also announced Windows 10 system requirements and Windows 10 upgrade matrix.

Windows 10 will be a free upgrade for current Windows 7, Windows 8.1 and Windows Phone 8.1 within the first year of launch.

Update: Windows 10 to release on July 29th, 2015