Windows 10
Development and Announcement: Windows 10, codenamed Threshold, aimed to unify the software ecosystem across various devices. It introduced universal Windows apps and showcased features like a revamped Start menu. Officially announced on September 30, 2014, it positioned itself as a comprehensive platform, combining the best of Windows 7 while addressing criticisms of Windows 8. The decision to name it Windows 10 signified significant differences from its predecessors.
Market Share and Reception: Windows 10 quickly became the most used version globally, surpassing Windows 7 by January 2018. Its market share peaked at 82.5% in December 2021 and is estimated to be around 66% in 2024. The positive reception praised its desktop-oriented interface, bundled software improvements, and integration of Cortana. However, criticisms included mandatory updates and privacy concerns. The goal of reaching one billion installations was achieved on March 16, 2020, nearly five years after its release.
Release, Upgrade Offers, and Licensing: Windows 10 was released on July 29, 2015, offering in-place upgrades from Windows 7 and 8.1. The free upgrade offer for eligible editions ended on September 20, 2023, with licensing tied to system installation and digital entitlements generated during activation. Retail copies used unique product keys, requiring re-activation for significant hardware changes. Devices running Windows RT were ineligible for an upgrade to Windows 10.