Microsoft’s June Patch Tuesday release for Windows 11 isn’t just a bag of security fixes. KB5094126, now rolling out to versions 25H2 and 24H2, quietly begins enabling a set of experience-focused changes that could make your PC feel snappier, let you share audio across two Bluetooth headphones, and relax a longtime camera restriction — all while dealing with the impending expiration of the Secure Boot certificates that have been part of the PC trust chain since Windows 8.

The update is mandatory, arriving via Windows Update and bumping systems to build 26200.8655 (25H2) or 26100.8655 (24H2). But here’s the catch: many of the headlining improvements are delivered through Microsoft’s gradual rollout machinery, meaning you won’t necessarily see them the moment the update installs. You might need to wait, check a few toggles, or even run a compatibility check.

What’s actually new in KB5094126

Low Latency Profile: a temporary CPU spike that targets everyday sluggishness

Microsoft’s most interesting play is invisible. The Low Latency Profile briefly bumps up processor clock speeds during short, interactive actions: opening the Start menu, launching Quick Settings, summoning notifications, triggering Windows Search, or right-clicking in File Explorer or the desktop. The boost lasts just one to three seconds, just long enough to make the operating system feel more immediate without torching battery life.

Windows Latest reports that the feature first appeared in a May optional update but is now being pushed to the broad Windows 11 user base through this month’s mandatory security patch. There’s no toggle in Settings to turn it on or off; you simply have to watch for snappier micro-interactions. Power users can monitor CPU frequency in Task Manager to spot the bursts, but normal users will either notice a difference or they won’t. On high-end hardware that’s already fast, the improvement may be subtle. Budget laptops and thin-and-light machines with conservative power profiles stand to gain the most.

Microsoft’s bet is that shaving a few hundred milliseconds off common shell operations will fix a perception problem: that Windows 11 sometimes feels sluggish even on capable hardware. The company hasn’t released a formal benchmark, but early coverage from outlets like TechRadar referenced internal testing suggesting up to a 70% reduction in menu launch times in some scenarios.

Shared Audio: now two Bluetooth devices can listen at once

If you’ve ever wanted to watch a movie with a friend on a laptop without a headphone splitter, KB5094126 finally delivers. Shared Audio lets you send system audio to two compatible Bluetooth audio devices simultaneously — a feature that iOS users have enjoyed for years. The underlying technology is Bluetooth LE Audio, so this won’t work with every headset or every PC. You’ll need a machine and headphones that support LE Audio, plus the right driver stack.

To check if your gear is ready, head to Settings > Bluetooth & Devices > Devices, select a paired headset, and look for the “Use LE Audio when available” toggle. If it’s there, you’re in business. Once the feature is live on your machine, Quick Settings gains a new Shared audio panel: tap it, pick two devices, and start sharing. Tap “Stop sharing” to revert to single-device playback.

This isn’t a power-user feature; it’s a living-room convenience. It acknowledges that laptops are often shared screens in dorm rooms, on trains, and during collaborative meetings. Administrators don’t need to do anything special here, but it’s worth flagging to support desks because users will inevitably ask why their specific Bluetooth speaker doesn’t show up in the shared list.

Multi-app camera: the webcam finally works across more than one application

Windows has long restricted the webcam to a single app at a time. If Teams grabs the camera, Google Meet, Windows Camera, or a third-party tool can’t use it simultaneously. KB5094126 introduces an opt-in setting that lifts this limitation. Under Settings > Bluetooth & devices > Camera, you’ll find a new toggle: “Allow multiple apps to use camera.” Flip it on, and you can run a meeting, record a video, and use a accessibility tool — all through the same camera module.

Microsoft also throws in a basic camera troubleshooting mode, accessible from the same settings page, that helps diagnose whether failures stem from drivers, hardware, or software conflicts. It’s a small but overdue quality-of-life addition, especially in hybrid-work environments where workers regularly stack conferencing, screen recording, and camera effects utilities.

For IT pros, the feature is off by default, which keeps privacy expectations intact. Managed environments that strictly control camera access should test how this toggle interacts with group policies and endpoint management tools before rolling out to broad fleets.

Secure Boot certificate deadline looms — and KB5094126 opens the update to more PCs

Behind all the user-facing fluff, KB5094126 pushes a firmware-level change that carries real weight. The Secure Boot certificates issued in 2011 begin expiring in June 2026. These certificates are part of the chain of trust that ensures only legitimate, signed bootloaders run before Windows starts. If they expire without replacement, systems could become vulnerable to boot-time malware or, in extreme cases, fail boot integrity checks.

Microsoft has been cautiously rolling out new certificates for months. This update widens eligibility to a larger set of PCs, though the company continues to stagger the rollout to avoid bricking devices. You can check your status by going to Windows Security > Device Security and scrolling to the Secure Boot section. A green message like “No further certificate changes are needed” means you’re covered. A yellow alert warns that your hardware or firmware cannot support the automated update. A red message indicates Windows is unable to install the necessary updates and you should contact your OEM for a firmware fix.

Systems that can’t apply the update won’t suddenly stop working, but they’ll operate with degraded trust until the certificates are updated. For older PCs, the solution likely lies in a BIOS/UEFI update from the manufacturer, not in a Windows patch alone.

Smaller but notable improvements

  • NPU telemetry in Task Manager: For AI PC owners, two new columns — “NPU” and “NPU Engine” — appear on the Processes, Users, and Details tabs, making it easier to track on-device AI workloads.
  • Custom user folder names during setup: When setting up Windows with a Microsoft account, you can now choose a friendly folder name instead of being stuck with the first five characters of your email address. This only applies to new installations.
  • Faster Microsoft Store downloads: Store app updates should now download faster and manage bandwidth more efficiently.
  • Better Magnifier announcements: The screen reader integration now voices zoom commands aloud.
  • Wallpaper accent color fixes: Windows should no longer shift accent colors after a reboot or upgrade.

What this means for you — and what to do now

Home users

Install KB5094126 through Windows Update. It’s mandatory, so it’ll arrive on its own. Once installed, don’t panic if you don’t immediately see all the new features. They’ll appear over the following days or weeks as Microsoft’s rollout logic decides it’s safe. In the meantime:
- Check Secure Boot status in Windows Security. If you see a yellow or red alert, visit your PC manufacturer’s support site; a BIOS update might be waiting for you.
- When Shared Audio appears in Quick Settings, try pairing two Bluetooth LE Audio headsets. If the “Use LE Audio” toggle isn’t present in your headset’s properties, the hardware may not support it yet.
- The multi-app camera toggle is in Settings > Bluetooth & devices > Camera. Turn it on if you frequently juggle multiple video apps.
- There’s no simple way to verify Low Latency Profile is active. If your Start menu and notifications suddenly feel slicker, that’s likely it. If nothing changes, you might be a high-end desktop user who didn’t need the boost anyway.

Power users and enthusiasts

You’ll want to know exactly what’s happening under the hood.
- Monitor CPU clocks with Task Manager or HWiNFO while opening the Start menu. A brief frequency spike confirms Low Latency Profile is enabled.
- If the feature hasn’t arrived, you can force-enable it using the ViveTool utility (search for “ViveTool Low Latency Profile” for guides), but be aware that manual feature toggling can occasionally cause instability.
- Download size matters if you’re managing multiple machines. The offline .msu installers weigh in at roughly 5.4 GB for 25H2 and 4.8 GB for 24H2 (both x64 and Arm64). Stick with Windows Update unless you’re dealing with a broken update pipeline or need to patch several offline devices.

IT administrators and managed fleets

Treat KB5094126 as more than a routine cumulative update.
- Secure Boot is the priority. Audit your hardware fleet for yellow or red Secure Boot statuses. Machines with unsupported firmware may require OEM intervention. This isn’t a checkbox you can ignore — certificate expiration is calendar-driven.
- Low Latency Profile and battery life. The CPU boost is short-lived, but across thousands of devices in a workday, aggregate battery impact could be noticeable. Monitor telemetry if you have strict power budgets.
- Multi-app camera and privacy. Since the setting is opt-in, it won’t suddenly expose camera streams. However, in regulated environments, the ability for multiple apps to access the camera simultaneously may need explicit governance. Test with your policy baseline before rollout.
- Shared Audio won’t break anything, but support tickets will come. Ensure your help desk knows the feature requires LE Audio hardware and is part of a gradual rollout.

How we got here: the long road to June’s patch

Windows 11’s perceived performance pains — particularly menu lag on modest hardware — have been a steady drumbeat since launch. Microsoft redesigned the shell with modern code and web-adjacent components, but the trade-off was that certain interactions felt less instantaneous than they did on older, more static versions of Windows. The Low Latency Profile is a direct answer to years of user feedback that said, “It’s not about benchmark scores; it’s about how it feels when I click Start.”

Bluetooth LE Audio has been available in consumer devices for a few years, but Windows 11 support has been piecemeal. Shared Audio brings the PC inline with phones and tablets that have long offered seamless audio sharing. The multi-app camera fix addresses a limitation that became painfully obvious during the pandemic: if you’re in a video meeting and need to snap a quick photo or join a second call, you shouldn’t have to disconnect first.

Secure Boot’s certificate expiration has been on Microsoft’s radar for years. The tech giant published official guidance on the transition as early as 2024, and the IT Pro blog repeatedly urged administrators to prepare. June 2026 is the drop-dead date for the 2011 certificates, so this update’s push to broaden the new certificates is a final countdown rather than a surprise.

Outlook: what to watch next

Microsoft isn’t done with performance tuning. Reports ahead of the June update suggested the company is testing an extension of Low Latency Profile to app launches, which would bypass splash screens and open software faster. If that lands in a future update, it could further reshape the feel of Windows 11 on everyday hardware.

The Secure Boot certificate story will also evolve. As June ticks into July, the pool of PCs still on old certificates will shrink — but for the stragglers, especially those with locked-down firmware from smaller or older OEMs, the path won’t be smooth. Expect more urgent guidance from Microsoft and PC makers.

For now, KB5094126 is an update worth installing sooner rather than later. It doesn’t look like a landmark release from the patch notes alone, but a faster Start menu, a friendlier camera, and a trustworthy boot chain are exactly the sort of things you notice only when they’re missing.