What KB5089573 Changes in Everyday Windows 11 Use
Windows 11 KB5089573 is an optional preview update that focuses on measurable performance optimization, accelerating system flyouts, app launch performance, and core shell experiences while also delivering reliability and quality-of-life fixes for everyday users. Instead of adding flashy new features, Microsoft is using this release to make Windows 11 feel more responsive in places people touch constantly: the Start menu, Search, Action Center, and system flyouts. The update sits within Microsoft’s K2 performance initiative, which was launched after long-running criticism that Windows 11 felt slower than earlier releases. According to Windows Central’s testing, system flyouts now respond far more quickly, and applications start with far less delay. KB5089573 is available as an optional download in Windows Update and will be folded into the next Patch Tuesday for users who prefer to wait for automatic installation.
70% Faster System Flyouts: Why It Matters
System flyouts are the small panels that appear when you adjust volume or brightness, expand quick settings, or open network and notification controls. These UI elements may seem minor, but they are triggered dozens of times a day, so any lag is immediately noticeable. Windows Central’s testing confirmed that KB5089573 improves system flyouts speed by 70 percent, making the interface feel far more immediate. Microsoft’s changelog describes the update as one that “accelerates app launch and core shell experiences such as Start menu, Search, and Action Center,” and those shell components rely heavily on flyouts. The gains will not arrive simultaneously for everyone, because the Low Latency Profile features behind these improvements are rolling out gradually. That means some users may install the update and see subtle improvements at first, with the full speed benefits arriving over the following weeks.
40% Faster App Launches and the New Performance Profile
Beyond interface polish, the headline change for many people will be app launch performance. Windows Central reports that with KB5089573 installed, app launches are up to 40 percent faster, shrinking the time between clicking an icon and seeing the app ready to use. This is part of Microsoft’s Low Latency Profile under the broader K2 initiative, which focuses on core responsiveness instead of piling on features. Faster app startup affects everything from opening productivity tools and browsers to launching games or creative software. Because the Low Latency Profile is being enabled in stages on Microsoft’s side, some systems may not immediately show the full 40 percent gain, even after installing the update. Over time, though, most Windows 11 users should experience more consistent, snappy app launches without needing to change hardware or settings.
Quality-of-Life Tweaks: From Sign-In to Search
KB5089573 also includes around 30 changes that improve daily workflows beyond raw speed. Windows Hello face and fingerprint sign-in now stay as the default method even if you previously picked another option, while entering your PIN three times in a row keeps the system on PIN until you switch back. Clipboard history opens faster, and Windows Search can now find files using as few as two characters, which makes it easier to locate documents with short or partial names. Task Scheduler now remembers custom column widths between sessions, reducing repetitive setup for power users. Task Manager gains expanded NPU monitoring, showing neural engines integrated into the GPU on the Performance page. Together, these refinements support the broader Windows 11 optimization effort by cutting friction in areas people repeatedly touch throughout the day.
Hardware, Security, and How to Get the Update
On the hardware side, KB5089573 aims to make connected devices more dependable. Displays attached through USB4 docks and hubs should wake more reliably from standby, and the updated USB3 stack improves recovery from unexpected hardware faults. Power handling changes help prevent apps from draining battery by keeping the sensor hub active when the device is in standby. Bluetooth audio sharing also arrives, using Bluetooth LE Audio broadcast technology so two people can listen to the same PC audio simultaneously. Windows Setup now allows custom user folder names directly from the Device Name page, removing a long-standing annoyance. The update also improves targeting for Secure Boot certificate rollout ahead of older certificates expiring. Because Windows 11 KB5089573 is an optional preview update, you must install it manually via Settings > Windows Update > Advanced options > Optional updates, or enable the “Get the latest updates as soon as they’re available” toggle.