Microsoft pushed out cumulative update KB5094126 on June 9, 2026, advancing Windows 11 versions 24H2 and 25H2 to OS builds 26100.8655 and 26200.8655, respectively. The patch delivers the month’s security fixes alongside a trio of usability improvements that had been in preview for several months: a system-wide Low Latency Profile, cross-device Shared Audio, and significantly faster file and settings search.

The update lands via Windows Update, Windows Server Update Services (WSUS), and the Microsoft Update Catalog. Enterprises managing devices through Microsoft Endpoint Manager or other patching tools should already see the update propagating. For most consumers, the download appears automatically, requiring a restart to complete installation.

What’s Fixed in KB5094126

As a mandatory June 2026 Patch Tuesday release, KB5094126 bundles critical security patches. Microsoft’s Security Response Center (MSRC) lists ten vulnerabilities addressed, including two rated “critical.” The most severe involve remote code execution in the Windows Kernel and an elevation of privilege flaw in the Bluetooth stack. No zero-days were exploited in this cycle, but the sheer number of fixes across Windows components—including the print spooler, Hyper-V, and the Windows Installer—makes the update urgent for all users.

Beyond security, the update resolves known bugs from earlier builds. One notable fix eliminates a hang that could occur when disconnecting an external monitor while a game or GPU-accelerated app was running full-screen. Another addresses an issue where the Start menu would occasionally fail to register mouse clicks after waking from sleep. Full details are in the KB5094126 release notes.

Low Latency Profile: Audio and Beyond

The star addition in KB5094126 is the new Low Latency Profile. Available as a toggle in Settings > System > Sound > Properties for your output device, it aims to slash audio latency to under 10 milliseconds on Windows 11 systems, provided the hardware and driver support it. This is a marked improvement from the typical 20–30 ms on standard Windows audio stacks, and it competes with the low-latency ASIO and WASAPI exclusive modes previously restricted to professional audio software.

Behind the scenes, the Low Latency Profile works by bypassing much of the Windows audio engine’s processing pipeline. Reverb, equalization, and virtual surround effects are disabled, and the audio buffer size is reduced to a minimum. Microsoft’s documentation indicates that Bluetooth LE Audio devices, USB headsets, and even built-in speakers on certain OEM systems can take advantage, but the profile is only active when an application explicitly requests low latency. Games, real-time communication apps like Microsoft Teams, and digital audio workstations are prime candidates.

For gamers, the difference is palpable. Competitive shooters benefit from tighter audio-video synchronization, while rhythm games become noticeably more responsive. In testing with a beta build a month prior, users reported that voice chat echo cancellation also improved because the lower latency reduced the delay between microphone capture and speaker output, making it easier for Teams to filter out feedback.

Enthusiasts should note that enabling Low Latency Profile may increase CPU usage slightly, as the audio stack must process smaller chunks of data more frequently. On devices with older processors, this could be a trade-off. Microsoft recommends leaving the setting off unless you actively need the performance boost, and the profile automatically disengages when no low-latency app is in the foreground.

Shared Audio: Stream Your Sound to Another PC

Shared Audio is a brand-new feature that lets you direct your PC’s audio output to a nearby Windows 11 device, essentially turning any laptop or tablet into a wireless speaker. The idea isn’t novel—Bluetooth and Chromecast have offered similar functionality for years—but the implementation is deeply woven into the Windows shell, requiring no third-party apps.

To use Shared Audio, both the source and target devices must be on the same local network, signed in with the same Microsoft account (or be part of the same family group), and running build 26100.8655 or later. A new “Share audio” toggle appears in the Quick Settings panel, accessible from the taskbar. Tapping it reveals a list of available devices; selecting one streams all system sounds, music, and video audio to the target in real time.

The stream uses a proprietary low-bandwidth codec optimized for speech and general audio, though a high-quality mode can be toggled for music. Latency is noticeable—about 200–300 ms—making it unsuitable for gaming or lip-sync critical video, but perfect for background music, podcasts, or feeding audio to a secondary screen in a multi-monitor setup. The feature relies on Wi-Fi Direct for direct peer-to-peer connections when possible, falling back to the local router if the two devices can’t bridge directly.

Microsoft envisions Shared Audio for scenarios where you want to, say, play a video on your desktop but listen through your Surface Pro on the couch, or where you want to extend the audio from a conference call to a tablet in another room. IT admins should note that the feature requires the “Shared Experiences” setting to be enabled, which can be managed via Group Policy. In enterprise environments, it can be disabled entirely using the “Disable Shared Experiences” policy.

During the Insider preview, users discovered a neat trick: Shared Audio also works with Android devices running the Link to Windows app, albeit with higher latency. This cross-platform echo makes Microsoft’s ecosystem stickier, though it’s not yet clear how battery life is affected on the receiving device.

Faster Search: Indexing That Feels Instant

The third major improvement in KB5094126 supercharges Windows Search. File search and settings search now feel nearly instant, even on older mechanical hard drives, thanks to a reworked indexer and a new semantic understanding engine. Microsoft says search results appear up to 50% faster on average, with cold searches (queries not in the index cache) seeing a 70% improvement.

Two foundational changes drive this. First, the search indexer now uses a priority-based queue. When you start typing in the Start menu or File Explorer search box, the indexer immediately shifts resources to the folders most likely to contain the target—based on recent activity, file type, and your search patterns. Second, a small machine-learning model runs locally to predict what you’re looking for and pre-fetches results for frequent searches. For example, if you often search for “Q3 report,” the moment you type “Q,” the model surfaces that file.

The settings search also benefits from a new natural language parser. Instead of requiring exact keywords like “bluetooth pairing,” you can now type “add my headphones” and see relevant Bluetooth settings. This parser supports English, French, German, Spanish, Japanese, and Chinese initially, with more languages promised in future updates.

On the tech side, the indexer now respects the “Modern Standby” power state, meaning it won’t aggressively consume resources while the device is on battery in connected standby. This was a common pain point on laptops, where indexing could drain battery overnight. Additionally, the update introduces a per-drive index exclusion option, allowing users to exclude slow external drives without resorting to full search disabling.

Power users will appreciate that the classic indexer Control Panel applet still works, but the modern Settings UI now surfaces indexer status and offers a “Rebuild” button directly under Settings > Privacy & security > Searching Windows. Early adopters report that a rebuild after installing KB5094126 dramatically improves result freshness.

Additional Tweaks and Known Issues

KB5094126 isn’t just about the headline features. The update also:
- Refines the taskbar thumbnail previews so that they now respect dynamic refresh rate (DRR) settings, eliminating an annoying flicker on high-refresh-rate displays.
- Adds support for Wi-Fi 7 on compatible hardware. While the driver support still depends on OEMs, the networking stack now recognizes 802.11be adapters and enables Multi-Link Operation (MLO) for simultaneous 2.4 GHz, 5 GHz, and 6 GHz connections.
- Smooths an animation glitch in File Explorer’s context menu where the “Show more options” dialog would stutter on entry-level GPUs.

No major regressions have been flagged, but the release does carry a few known issues. Citrix Workspace users report that virtual desktops rendered within the app may briefly freeze when the Low Latency Profile is engaged. A workaround is to disable the profile when using Citrix. Shared Audio, too, shows an intermittent bug where the target device may not appear in the list until both machines are rebooted. Microsoft says a fix is slated for next month’s optional preview.

How to Get the Update

Windows 11 users on version 24H2 or 25H2 can navigate to Settings > Windows Update and select “Check for updates.” The patch should download automatically. Enterprise administrators should note that the update is available through the Microsoft Update Catalog for offline deployment via DISM or third-party tools.

For those still on version 23H2: this update is not applicable. Microsoft has begun nudging those users toward 24H2 with a notification in Windows Update, as 23H2’s end-of-service date for Home and Pro editions looms in November 2026.

The Bottom Line

KB5094126 shows Microsoft iterating on Windows 11’s core experience with a focus on real-time audio and seamless cross-device flow. The Low Latency Profile addresses a long-standing gripe among gamers and creators, Shared Audio fleshes out a missing ecosystem link, and Faster Search chips away at one of the OS’s most persistent friction points. Together, they make the platform more responsive and connected.

While not every feature will matter to every user, the absence of major bugs and the inclusion of critical security patches make this update a straightforward recommendation. Those who have been testing the features in Dev and Beta channels will find them more polished here—and the promises of further tuning in upcoming patches suggest Microsoft isn’t done refining these additions.