Windows 11, launched in 2021, is the operating system for hundreds of millions of PCs worldwide and is built on the same architecture as Windows 10 but has stricter hardware compatibility requirements. Users must upgrade due to the end-of-support date for Windows 10. The user interface features a redesigned Start menu, taskbar, and Settings app, along with new functionalities like a Widgets pane and enhanced window management. Hardware-assisted security is mandatory, with features like Secure Boot enabled by default. Windows 11 can be acquired with new PCs or through free upgrades for valid Windows 10 license holders, while retail licenses are available at similar prices to Windows 10. As of January 31, 2023, Microsoft stopped retail sales of Windows 10 licenses. The compatibility requirements for Windows 11 include a 64-bit processor, a minimum of 4GB RAM, and at least 64GB of storage. User feedback indicates a mix of satisfaction and dissatisfaction regarding the interface changes. Windows 11 is reported to be more reliable and secure than Windows 10, with support for Windows 10 ending on October 14, 2025. Installation options include the Windows 11 Installation Assistant and USB media creation, with version 24H2 currently available and version 25H2 forthcoming.