What the New Windows 11 Performance Update Actually Does
The latest Windows 11 performance update centers on the KB5089573 preview build and Microsoft’s Low Latency Profile (LLP) CPU boost mode, a set of changes designed to cut interface lag, speed up app launches, and make everyday actions like opening the Start menu, notifications, and core system flyouts feel faster without requiring any hardware upgrades. According to Windows Central’s testing, KB5089573 delivers a 70% speed boost to system flyouts and a 40% improvement for app launches, targeting the parts of Windows that users touch most often. Microsoft describes the update as one that “accelerates app launch and core shell experiences such as Start menu, Search, and Action Center,” which lines up with reports that lower‑end PCs feel noticeably snappier. These gains arrive as part of Microsoft’s broader K2 initiative, which focuses on fixing core responsiveness rather than adding new features.
KB5089573: Faster Menus, Search, and App Launches in Daily Use
KB5089573 focuses on the parts of Windows that most often feel slow: menus, search, and launching apps. System flyouts—such as quick settings, volume, network, and other small panels—now open much more quickly, with tests reporting a 70% improvement. App launch faster behavior is also a highlight, with a 40% speed boost that you will notice when opening commonly used programs and system tools. The update also smooths out core shell experiences like Start, Search, and Action Center, so the interface feels less “sticky” when you click or tap. Beyond speed, KB5089573 includes more than 30 reliability and quality-of-life changes, from faster clipboard history and more responsive Windows Search to better display wake behavior on USB4 docks and more resilient USB3 fault handling. Because KB5089573 is an optional preview, you must install it manually or enable “Get the latest updates as soon as they’re available.”
Inside LLP CPU Boost Mode: Short Bursts, Snappier UI
The new LLP CPU boost mode is the engine behind much of this added responsiveness. LLP (Low Latency Profile) briefly pushes the CPU into a boost state for about 1–3 seconds whenever you perform key actions, like opening the Start menu or the notifications center. That short burst of extra CPU power is enough to make Windows’ UI feel brisk, but not long enough to cause major heat or battery drain for most users. Microsoft is applying LLP first to core shell interactions that often feel laggy on low‑end hardware, with plans to extend it to accelerate app start times in future updates. Some users worry that LLP is a “cheat,” but similar short‑term boosts already exist on Android, macOS, and Linux, helping those systems feel more responsive. On Windows 11, LLP is starting as a preview feature and may take time to enable on each device.
K2 Initiative: A Strategy for Efficiency, Not Just Features
KB5089573 and LLP are part of Microsoft’s K2 project, a multi‑step effort to improve Windows 11’s efficiency instead of piling on features. For years, some users have complained that Windows 11 felt slower than earlier versions, especially on modest hardware. K2 aims to change that by focusing on core architecture: moving more UI elements to WinUI 3 to cut bloat, optimizing WinUI 3 itself for speed, and tightening up long‑standing weak spots like shell responsiveness and search performance. This update also includes practical tweaks such as faster clipboard history, smarter Windows Search that can find files with as few as two characters, better Task Manager NPU monitoring, and improved power handling that prevents certain apps from draining the battery during standby. Together, these changes show a clear shift toward making Windows feel lighter and more consistent in everyday use, not only in synthetic benchmarks.
What Users Can Expect and How to Get the Update
In real-world terms, this Windows 11 performance update should make your PC feel quicker across routine tasks—opening the Start menu, pulling down system flyouts, searching for files, and starting your favorite apps. You don’t need new hardware to see benefits, and low‑end systems stand to gain the most from LLP’s short CPU boost bursts. However, not every change is active right after installation. Microsoft is rolling out Low Latency Profile features gradually, so the full speed boost may take weeks to appear. To try it now, go to Settings > Windows Update > Advanced options > Optional updates and install KB5089573, or turn on “Get the latest updates as soon as they’re available.” Power users can force‑enable LLP with tools like ViveTool, though that is only recommended if you are comfortable with experimental features. Otherwise, these improvements will arrive automatically in an upcoming Patch Tuesday release.