Windows 10, released by Microsoft in 2015, offers a user-friendly operating system that integrates features from Windows 7 and 8.1 and is available for both desktops and mobile devices. Key functionalities include a revamped Start menu, virtual desktops for enhanced organization, and Cortana, an intelligent personal assistant for assistance with tasks and information retrieval. The taskbar provides quick access to frequently used applications and notifications, improving overall user experience.