Microsoft is advancing its Project K2 initiative to improve the Windows 11 user experience by addressing performance issues, AI features, updates, and storage use. A key aspect of this project is transitioning Windows 11 components like the Start menu and File Explorer to WinUI 3, with a focus on optimizing performance. Recent updates show that File Explorer has achieved a 41% reduction in memory allocations, a 63% decrease in transient allocations, a 45% drop in function calls, and a 25% reduction in execution time for WinUI code during launches. These enhancements are expected to be integrated into the winui3/main development branch and WinAppSDK 2.x, with some optimizations requiring applications to opt in. Microsoft is also working with various Windows teams to ensure comprehensive performance gains and has introduced a Low Latency Profile feature to boost CPU performance temporarily during application launches.