What the Windows 11 KB5089573 Performance Update Delivers
Windows 11 KB5089573 is a cumulative system performance update that focuses on speeding up core shell elements and app launches so everyday interactions like opening menus, searching, and switching apps feel faster and more responsive across compatible PCs. In testing reported by Windows Central, the update’s new Low Latency Profile helped system flyouts such as volume, network, and quick settings panels respond up to 70 percent faster, while app launches improved by about 40 percent compared with previous builds. Microsoft’s changelog describes KB5089573 as an update that “accelerates app launch and core shell experiences such as Start menu, Search, and Action Center,” signaling a direct response to complaints that Windows 11 felt slower than earlier versions. The update is currently shipping as an optional preview, with its features set to fold into a broader security release for the wider user base next month.
Inside the K2 Initiative and Low Latency Profile
KB5089573 is the first major expression of Microsoft’s K2 initiative, an internal effort focused on foundational Windows 11 speed improvements rather than more features. K2 targets the “core shell experiences” users hit dozens of times a day: Start menu, Search, Action Center, system flyouts, and app startup. Behind the scenes, this release relies on a Low Latency Profile that appears to give the CPU a short performance boost when users interact with the shell, echoing social media reports that the system briefly raises CPU performance to cut delays. According to Windows Central’s coverage, these changes are being rolled out gradually, so even after installing Windows 11 KB5089573, it may take several weeks before every device sees the full 70 percent menu and 40 percent app launch gains, depending on Microsoft’s rollout controls and hardware configurations.
Everyday Improvements Beyond Raw Speed
Alongside faster app launches and shell actions, KB5089573 brings a collection of small quality-of-life and reliability tweaks that help daily use feel smoother. Windows Hello face and fingerprint sign-in remain the default even if users temporarily switch methods, while entering a PIN three times keeps the system with PIN until changed again. Bluetooth audio sharing arrives through Bluetooth LE Audio broadcast technology, enabling two listeners on one PC. Task Manager gains expanded NPU monitoring, showing neural engines integrated into a GPU on the Performance page and optional columns for NPU metrics on key tabs. Other under-the-hood changes improve USB4 display wake behavior, make the USB3 stack more resilient to device faults, and refine power handling so background apps are less likely to drain the battery in standby. Smaller touches include faster Clipboard history opening, better Windows Search sensitivity, and Task Scheduler remembering custom column widths between sessions.
Known Installation Pitfalls and Rollback Risks
While KB5089573 targets better system performance, installation is not risk-free for every machine. Microsoft still lists a long-running 0x800f0922 installation error tied to the May 2026 security update, which affects devices with limited free space on the EFI System Partition, particularly those with around 10 MB or less available. On such systems, the update can fail around 35–36 percent progress and automatically roll back with a message along the lines of “Something didn’t go as planned. Undoing changes.” A permanent fix is still in progress and will arrive in a future Windows update, so users running close to storage limits on critical system partitions should check space and consider a backup before installing. Because KB5089573 is an optional preview, it is safer for cautious users to wait until the changes are bundled into the next regular Patch Tuesday release.
Should You Install Windows 11 KB5089573 Now?
Deciding whether to prioritize KB5089573 depends on how much you value immediate responsiveness versus a conservative update approach. Power users who notice sluggish Start menu openings or delayed system flyouts stand to benefit most from the 70 percent menu and 40 percent app launch improvements, especially on mid-range hardware where interface latency is more obvious. Because the update is optional, you can trigger it manually through Windows Settings > Windows Update > Advanced options > Optional updates, or by enabling the “Get the latest updates as soon as they’re available” toggle. However, if your system already struggles with low disk space or has previously hit the 0x800f0922 error, waiting for the finalized Patch Tuesday release may be wiser. For most users with healthy storage and recent backups, KB5089573 is a meaningful system performance update worth installing within the next cycle.