What the KB5089573 Performance Update Changes
The Windows 11 performance update KB5089573 is a system-level release that accelerates the core interface, boosts app launch performance, and optimizes system flyouts so everyday actions such as opening Start, Search, or notifications feel much more responsive on existing hardware. At its heart, this is not a feature pack but a speed and responsiveness overhaul aimed at making the operating system feel lighter and more direct. Windows Central’s testing reports that system flyouts, including UI elements like volume, network, and quick settings, are up to 70 percent faster, while app launches improve by about 40 percent. Microsoft’s own changelog describes KB5089573 as an update that “accelerates app launch and core shell experiences such as Start menu, Search, and Action Center,” signaling a clear focus on the basics rather than eye-catching new features.
Under the Hood: Low Latency Profile and Shell Tuning
KB5089573 is the first major output of Microsoft’s K2 initiative, which shifts attention from adding new features toward fixing long-standing complaints that Windows 11 felt slower than earlier versions. The update introduces Low Latency Profile features that tune how quickly core shell elements respond, cutting delays when you open the Start menu, trigger Search, or call up the Action Center. These changes apply to the system flyout optimization work as well, trimming the time between a click or keypress and the interface reacting. Microsoft is rolling out Low Latency Profile gradually, which means you may not see the full speed boost the moment you install the update. Over several weeks, additional flags and backend settings will light up on individual systems, so performance should continue to improve without further user action.
Real‑World Impact: Faster Menus, Quicker Apps, Smoother Daily Use
On paper, a 70 percent improvement to system flyouts and a 40 percent boost to app launch performance translate into a desktop that feels far less hesitant. You should notice quicker responses when changing volume or Wi‑Fi settings, switching notifications, or opening small pop‑up panels that used to lag behind your clicks. Apps that previously took a moment to appear—browsers, email clients, or note‑taking tools—will start up faster, narrowing the gap between intention and action. This directly addresses complaints that Windows 11 animations and UI chrome made the system feel sluggish. The update also improves broader responsiveness in areas like Windows Search, which can now find files using as few as two characters, and speeds up clipboard history loading, further reducing small but frequent delays that add up over a full workday.
Beyond Speed: Quality‑of‑Life Improvements in KB5089573
While the KB5089573 speed boost headlines the release, Microsoft also includes about 30 reliability and quality‑of‑life changes that tidy up daily annoyances. Windows Hello now stays as your default sign‑in choice even if you previously switched to another method, while entering your PIN three times in a row keeps the system on PIN until you change it back. Bluetooth audio sharing arrives via Bluetooth LE Audio broadcast technology, allowing two people to listen to the same PC audio at once. Setup gains the option to choose a custom user folder name directly from the Device Name page. Under the hood, displays connected through USB4 docks or hubs should wake more reliably, USB3 error recovery is improved, and new power handling fixes help stop apps from draining the battery by keeping the sensor hub awake during standby.
How to Get KB5089573 and What to Expect Next
KB5089573 is an optional preview update, so it will not install on its own unless you ask for it or enable early access. You can grab it through Settings > Windows Update > Advanced options > Optional updates, or by turning on the “Get the latest updates as soon as they’re available” toggle so it arrives automatically. The Low Latency Profile–based improvements will phase in over time, so performance may keep improving in the weeks after installation. For everyone who prefers to wait, Microsoft plans to fold these changes into the next Patch Tuesday release, at which point the Windows 11 performance update will reach a much wider audience. Together, the K2 initiative and this release suggest that future builds will continue to focus on faster core UI and more responsive applications.