Goodbye Lag: Microsoft’s “Windows K2” Project to Rebuild the Start Menu for Instant Speed

Microsoft is redesigning the Windows 11 Start menu (codename Windows K2) to move from a hybrid WebView2/native implementation to a fully native WinUI 3 architecture, aiming to improve responsiveness, reduce latency under high CPU load, and introduce modular user controls for layout and feature toggles such as the "Recommended" section and the full app list.