Microsoft has pushed Windows 11 builds 26100.8514 and 26200.8514, tagged under KB5089573, to the Release Preview Channel on May 14, 2026. This preview flight serves as the early look at the upcoming non-security optional update expected for Windows 11 version 24H2 and the newer development branch. The update brings three noteworthy feature additions: Shared LE Audio support, multi-app camera access, and an NPU performance module in Task Manager, all aimed at enhancing connectivity, productivity, and AI-aware performance monitoring on modern Windows PCs.

Inside KB5089573: Two Builds Across Two Fronts

The duplex release—26100.8514 for the current release base and 26200.8514 for a forward-looking branch—signals Microsoft's continued refinement across Windows 11 version trains. Build 26100.xxxx series aligns with the 24H2 servicing track, while 26200.xxxx hints at the next feature update (likely 25H2) gradually taking shape. By seeding both into the Release Preview ring, Microsoft is stress-testing these features across a broader but still controlled audience before broader deployment.

Users enrolled in the Windows Insider Program's Release Preview Channel can download KB5089573 via Windows Update. The update carries no mandatory security fixes but previews the quality improvements and optional features that will roll out to all compatible Windows 11 devices in the coming weeks. As with all Release Preview builds, early adopters get a glimpse of what’s cooking while helping validate stability.

Shared LE Audio: Synchronized Sound, Untethered

Bluetooth LE Audio has been a slow-burn revolution in wireless audio, and Windows 11 is now embracing a key capability: shared audio streaming. With KB5089573, users can broadcast a single audio source—be it music, video, or voice chat—to multiple Bluetooth LE Audio-capable headphones or speakers simultaneously. This builds on the Auracast broadcast audio specification, transforming a Windows machine into a personal audio hub.

Shared LE Audio eliminates the need for messy splitter cables or third-party software. Imagine two people watching a movie on a laptop during a flight using their own earbuds, or a presentation where multiple attendees listen in without disturbing the room. The feature taps into the low-latency, high-efficiency codec (LC3) that LE Audio natively supports, ensuring sync drift stays imperceptible.

To use it, both the PC and the receiving devices must support Bluetooth LE Audio—a checkbox that an increasing number of modern headphones and earbuds tick. Windows will surface a familiar “Share audio” toggle when compatible devices are connected. This move aligns Windows with Android and iOS, which have already rolled out Auracast transmitter roles. For Copilot+ and other AI PCs, this also opens the door to assistive listening scenarios, where live captioning or translation can be streamed to an individual’s earpiece while others hear the original audio.

Multi-App Camera: Breaking the Single-Stream Barrier

For years, Windows has locked the camera to a single application at a time—a frustration for anyone juggling video calls, content creation, and security apps. KB5089573 introduces native multi-app camera support, allowing multiple desktop or UWP applications to access the camera sensor concurrently.

Under the hood, the Camera Capture Service now virtualizes the video stream, much like a modern smartphone OS. Apps written against Windows’ newer camera APIs can tap into a shared stream without stealing exclusivity. That means you can run Teams and OBS Studio side by side, with both ingesting video, or keep a QR-code scanner open while on a Zoom call. Privacy remains intact: the camera LED indicator stays on throughout, and users retain per-app permission controls.

This feature doesn’t duplicate sensor data—it’s one capture, multiple consumers, so performance overhead is minimal. It will especially benefit hybrid workers who need to present physical documents while on camera, developers testing multimedia apps, and streamers layering effects in real time. The capability extends to IR camera modules used for Windows Hello facial recognition, enabling simultaneous secure login and video capture.

Microsoft had been testing this functionality with Insiders for months, and its arrival in Release Preview suggests a polished experience is imminent. Legacy apps that rely on the older DirectShow model may still claim exclusive access, but the ecosystem is expected to migrate quickly given the obvious utility.

NPU Task Manager: Measuring AI Silicon Performance

Perhaps the most forward-looking addition is a dedicated Neural Processing Unit (NPU) column and performance graph in Task Manager. As Copilot+ PCs and Intel/AMD chips with integrated AI engines become mainstream, understanding how these dedicated accelerators are utilized grows critical. KB5089573 adds an “NPU” tab (or graph option) under the Performance section, mirroring the familiar CPU, GPU, and memory monitors.

Users can now see real-time NPU utilization as a percentage, along with dedicated memory usage and engine temperature. This transparency helps demystify workloads like Windows Studio Effects, background blur, noise suppression, and on-device AI models that tap into the NPU. If an application is unexpectedly hammering the NPU, it will be immediately visible, allowing power users to troubleshoot battery drain or thermal throttling.

The NPU graph sits alongside other resource meters, but its appearance is conditional—Task Manager will only display it if the system detects a compatible NPU. On traditional PCs without dedicated AI hardware, the view remains unchanged. For developers, this provides a quick sanity check that their AI inference is actually landing on the NPU rather than falling back to the CPU or GPU.

This addition is part of Microsoft’s broader push to make Windows a first-class AI platform, giving users the same level of insight into NPU resources as they have into traditional compute and graphics. Combined with recently introduced Dev Home and direct SDK support, the NPU Task Manager closes a key observability gap.

Additional Improvements and Known Issues

While Microsoft’s release note for KB5089573 remains concise, early testers have spotted smaller quality-of-life tweaks. The system tray now shows a contextual battery usage graph on laptops, and File Explorer’s context menu has gained a dedicated “Share with Bluetooth” entry. Some report improved Wi‑Fi roaming aggressiveness and a fix for a long-standing memory leak in File Explorer when loading large media folders.

No major showstoppers have surfaced, though a handful of Insiders note that Bluetooth LE Audio sharing requires re-pairing of devices if they were previously connected using classic Bluetooth. Microsoft is aware of the pairing workflow hiccup and may address it in a later cumulative refresh. As always with pre-release code, production machines should hold off until the official optional update lands.

How to Get KB5089573 Right Now

To install the preview, enroll your PC in the Windows Insider Program via Settings > Windows Update > Windows Insider, select the Release Preview Channel, and then check for updates. KB5089573 will download and install like a typical monthly quality update. If you’re already running 24H2 (26100.xxxx) or a current Dev/Release Preview build, the update should appear automatically.

Remember that this is an optional preview, not a security update. You can defer it or uninstall it via update history if issues arise. Microsoft typically rolls these previews into the following month’s mandatory Patch Tuesday update, but feature backporting across versions can vary.

What This Signals for Windows 11’s Evolution

KB5089573 isn’t just a grab bag of features; it shows where Windows 11 is heading in the latter half of 2026. Shared LE Audio underscores the OS’s commitment to modern, cable-free peripherals and inclusive audio experiences. Multi-app camera finally catches Windows up to mobile platforms, removing a friction point for creators and telecommuters. And the NPU Task Manager is a clear nod to the AI PC era, where dedicated neural silicon needs the same stewardship as CPU and GPU resources.

All three features are opt-in and additive—they don’t drastically alter the UX for users who don’t need them, but they lay foundations for new classes of applications. The timing also aligns with rumored new Surface hardware that could double down on NPU performance and Bluetooth LE Audio capabilities, though Microsoft remains tight-lipped on unannounced devices.

For enterprises, these improvements bring tangible productivity gains and better hardware utilization metrics, which IT administrators can leverage for fleet performance audits. The multi-app camera support alone solves a compliance headache for sectors that require both video conferencing and archival recording.

As the preview unfolds and feedback pours in, expect Microsoft to refine these features before the optional update reaches general availability. The Release Preview Channel provides the ideal testbed: adventurous enough to catch edge cases, stable enough to simulate real-world use. If history is a guide, the final public version will drop in late May or early June, though an official date hasn’t been confirmed.

Windows 11 continues to mature into a platform that not only powers traditional desktop work but embraces the hybrid, AI-enhanced future Microsoft has been painting for years. KB5089573 is a small but significant brushstroke in that larger picture.