What KB5089573 Changes and Why It Matters
The Windows 11 KB5089573 performance update is a system enhancement that accelerates app launches, speeds up core interface elements like Start and Search, and reduces everyday latency to make routine PC interactions feel smoother and more responsive for users. Windows Central’s testing shows that system flyouts, such as network or volume menus, are up to 70 percent faster, while app launches are about 40 percent quicker after the update. Microsoft describes KB5089573 as accelerating “app launch and core shell experiences such as Start menu, Search, and Action Center,” and it is the first big delivery from the company’s K2 initiative, which focuses on fixing perceived sluggishness instead of layering on new features. These gains target the small, constant delays that make an operating system feel slow, turning menu clicks, flyouts, and search into more immediate actions.
Under the Hood: Low Latency Profiles and Everyday Speed
KB5089573 introduces Low Latency Profile features that Microsoft is rolling out gradually, so users might not see the full Windows 11 performance update benefits immediately. Over the following weeks, these profiles tune how the shell and apps respond to input, trimming the delay between a click and a visible response. System flyout speed improves, so volume, network, or quick settings menus appear more promptly, and Windows Search feels quicker, even when using as few as two characters to find files. Clipboard history opens faster, and Task Scheduler now remembers column width tweaks, which reduces minor daily frustrations. The update also refines reliability with around 30 changes, including better USB4 display wake behavior and stronger USB3 stack recovery after hardware faults. Together, these adjustments aim to make Windows 11 feel faster in the places users touch most, not just in synthetic benchmarks.
K2 Initiative: Fixing Windows 11’s Sluggish Reputation
For years, one of the loudest complaints about Windows 11 was that it felt slower than Windows 10 in basic interactions. Microsoft responded with the K2 initiative, a program focused on foundational performance rather than headline features. KB5089573 is the first major update born from K2, targeting delays in Start, Search, Action Center, and app launch sequences that users hit dozens of times a day. Beyond speed, it includes quality-of-life improvements such as faster clipboard history, more responsive Windows Search, and better power handling that prevents apps from keeping the sensor hub busy during standby. Task Manager now shows NPU hardware integrated into GPUs, which matters as AI workloads become more common. By tightening these fundamentals, Microsoft is trying to change the narrative around Windows 11 from “slower but prettier” to a clear upgrade that feels quicker under normal workloads.
Windows 10 Holdouts: Performance as a Reason to Upgrade
Despite Microsoft’s push, many PCs still run Windows 10, with HP estimating that roughly 30 percent of its installed base has yet to move. According to HP’s leadership, this slow migration has become a short-term business opportunity as customers eventually refresh hardware to meet Windows 11’s requirements. Hardware limits also play a role; earlier estimates suggested around 400 million systems could not upgrade because of requirements like TPM 2.0 and newer processors. For users on compatible devices who are undecided, KB5089573 faster launches and system flyout speed gains make the Windows 11 upgrade benefits more tangible. Everyday interactions such as opening the Start menu, searching files, or launching common apps now respond more quickly, addressing a key friction point for Windows 10 users who worried about trading responsiveness for a new interface.
Deployment, Rollback Risks, and Other Notable Tweaks
KB5089573 is currently an optional preview update, so users must install it manually via Windows Update’s Optional updates section or enable the “Get the latest updates as soon as they’re available” toggle. Because Low Latency Profile features activate gradually, IT admins should plan for a phased user experience rather than an instant jump in performance. Like any system-level change, there is a known rollback risk: environments should monitor for unexpected behavior and be ready to roll back if mission-critical apps show issues. The update also includes notable tweaks such as Bluetooth audio sharing, allowing two listeners to share audio via Bluetooth LE Audio broadcast, and improvements to Windows Setup, which now lets users pick a custom user folder name from the Device Name page. Secure Boot certificate targeting is improved, helping more eligible devices receive updated certificates as older ones approach expiry.