Microsoft's Windows 11, launched in 2021, has been criticized for significant performance issues, making it potentially the least performant version of Windows in over two decades. Independent benchmarks reveal that Windows 11 is slower than its predecessors in areas such as boot times, application launches, and overall system responsiveness. Users with high-end hardware, including 13th-generation Intel Core processors, have reported noticeable slowdowns compared to Windows 10. Performance assessments indicate that Windows 11 struggles in various categories, including file operations, multitasking, and gaming, with longer boot speeds reminiscent of older systems. Gamers have experienced stuttering and frame rate drops, and Microsoft has acknowledged these issues in updates since 2022. The operating system is criticized for being a "resource hog," with preloaded features consuming resources even when idle. Users have reported lagging File Explorer and freezing processes, leading some to consider alternative operating systems. IT departments have noted increased support tickets related to performance issues, prompting some to delay upgrades from Windows 10. Microsoft has offered optimization advice, but critics argue these are temporary fixes for deeper architectural problems. The performance issues have implications for software developers and hardware manufacturers, increasing development costs and complicating hardware optimizations. Analysts warn that without prompt action, Microsoft's market dominance could be at risk, as users advocate for a leaner, faster Windows.