Microsoft released KB5094126 for both Windows 11 version 25H2 (OS Build 26200.8655) and version 24H2 (OS Build 26100.8655). This is part of the June 2026 Patch Tuesday update, which primarily focuses on important security fixes and quality improvements designed to keep Windows devices protected and running smoothly. The update also introduces several new features, including Shared Audio support for Bluetooth LE Audio devices, Multi-App Camera support, accessibility improvements for Magnifier users, improved NPU monitoring in Task Manager, and a long list of performance and reliability fixes.
The update also includes fixes for Windows Hello authentication, USB and docking device reliability, Windows Search, Start menu responsiveness, storage management, clipboard history, and overall system stability.
Microsoft noted, some new features are being rolled out gradually through Microsoft’s Controlled Feature Rollout (CFR), meaning they may not be available on all devices immediately after installation.
Let’s take a closer look at what’s new in Windows 11 KB5094126.
| Update Summary | Details |
|---|---|
| KB Number | KB5094126 |
| Build Numbers | 26200.8655 (25H2) / 26100.8655 (24H2) |
| Release Date | June 9, 2026 |
| Update Type | Security Update (Patch Tuesday) |
| Primary Focus | Security Fixes, Quality Improvements, New Features |
| Includes | Low Latency Profile, Shared Audio, Multi-App Camera, NPU Monitoring |
| Installation Required | Recommended |
| Restart Required | Yes |
Contents
What’s new in Windows 11 KB5094126 Update
The June 2026 update introduces several new features focused on performance, accessibility, device compatibility, and AI-powered experiences. It also addresses 200 vulnerabilities, including three publicly disclosed zero-day vulnerabilities.
Low Latency Profile Improves Real-Time Performance
One notable addition in this release is a new Low Latency Profile that briefly boosts CPU speeds to accelerate various background processes. It speeds up app launches and core shell experiences such as Start menu, Search, and Action Center.
Microsoft says the feature helps Windows prioritize time-sensitive tasks more efficiently, which can improve responsiveness and reduce interruptions during demanding activities.
Windows 11 now supports Shared Audio, which allows two compatible Bluetooth LE Audio devices to listen to the same audio stream from a single PC simultaneously.
This feature can be useful when watching movies, listening to music, or sharing educational content without external audio splitters.
To use Shared Audio:
- Open Quick Settings from the taskbar.
- Select Shared Audio.
- Choose two supported Bluetooth audio devices.
- Click Start Sharing.
Microsoft says the feature uses Bluetooth LE Audio broadcast technology for a smoother wireless experience.
Multi-App Camera Support
Windows 11 can now allow multiple applications to access the same camera stream simultaneously. For example, a video conferencing app and accessibility software can use the camera simultaneously without conflict. Microsoft has also introduced a Basic Camera Mode designed to improve compatibility and troubleshooting when camera-related issues occur.
Enterprise administrators can manage these camera options through Group Policy settings.
Task Manager Gets Better AI Hardware Monitoring
Task Manager now offers expanded monitoring capabilities for systems equipped with Neural Processing Units (NPUs).
Users can view:
- NPU utilization
- NPU engine activity
- Dedicated NPU memory usage
- Shared NPU memory usage
Users with Copilot+ PCs and other AI-capable systems can now more effectively monitor Neural Processing Unit activity directly in Task Manager. Microsoft also improved CPU speed reporting for virtual machines after resuming from hibernation.
Magnifier Accessibility Improvements
The Windows Magnifier tool receives several accessibility enhancements in this update.
Users will now hear clearer announcements when changing zoom levels, switching viewing modes, enabling color inversion, or turning Magnifier on and off.
Microsoft has also added support for magnifying protected content and improved smoothness when moving Magnifier in Lens mode.
Reliability and Quality Improvements
In addition to new features and security updates, KB5094126 includes several fixes to improve the overall stability and reliability of Windows 11.
Microsoft has improved Windows Hello sign-in responsiveness and reduced authentication delays in certain scenarios. The update also brings enhancements to storage management, including better Dev Drive size management, improved temporary file handling, and more consistent storage configuration options.
Users may also notice improved responsiveness and reliability in the Start menu, Windows Search, and Action Center. Microsoft has resolved several issues affecting touch keyboard behavior at sign-in, clipboard history performance, and general input reliability.
For users who rely on external devices, the update includes fixes for USB hubs, docking stations, and USB4 devices, resulting in better connectivity and stability. Additional improvements address issues with desktop icon loading, Task Scheduler setting retention, and overall system performance.
This update addresses an issue that could result in Stop errors HYPERVISOR_ERROR (0x20001) and KMODE_EXCEPTION_NOT_HANDLED (0x1E) after installing KB5089573 on some devices during system restarts, virtual machine operations, or while running some gaming applications
Microsoft also notes that this update resolves a previously known issue that could cause some security updates to fail with error code 0x800f0922 on certain systems.
Security Fixes
In addition to new features and quality improvements, KB5094126 includes important security updates for Windows 11. These fixes address vulnerabilities across multiple Windows components and help protect devices from emerging security threats.
Today’s update also includes an important fix for a BitLocker security bypass vulnerability (CVE‑2026‑45585) that could allow attackers to bypass BitLocker Device Encryption using the Windows Recovery Environment.
Because security updates are cumulative, installing this release also includes protections and fixes from previous updates.
How to Install Windows 11 KB5094126 Update
KB5094126 is available via Windows Update and Microsoft Update and should download and install automatically on Windows 11 24H2 and 25H2 devices.
If you want to check manually:
- Press the Windows key + X, then select Settings. Go to Windows Update, then hit Check for updates.
- You should see the June 2026 cumulative update (KB5094126) (26200.8655) available for download.
- Click on the Download Now button to begin the process. Once done, reboot your computer to apply the changes.
- Windows 11 KB5094126 download offline installer
- Windows 11 KB5082052 download offline installer
The link above points to the Microsoft Update Catalog, a library of Windows Update offline installers.
- First, click on the ‘Download’ button next to the version of the OS installed on your machine.
- Next, run the .msu files to install the update.
- Once done, reboot your PC to apply the changes.
Press the Windows key + R, type winver, and click OK to check the Windows 11 build version.
Should you install Windows 11 KB5094126?
Yes. KB5094126 is a Patch Tuesday security update that includes important security fixes, quality improvements, and several new features for Windows 11. Because security updates help protect your device from newly discovered vulnerabilities, Microsoft recommends installing the update as soon as possible.
In addition to security improvements, the update introduces features such as Low Latency Profile, Shared Audio support, Multi-App Camera functionality, accessibility enhancements, and expanded AI hardware monitoring in Task Manager. Most users should install the update through Windows Update when it becomes available.
For users who prefer maximum stability, it may be worth waiting a few days to monitor reports of any widespread installation or compatibility issues, although Patch Tuesday updates are generally recommended for all supported devices.
Troubleshooting: Windows 11 KB5094126 Fails to Install
If the Windows 11 KB5094126 update fails to install or gets stuck, try the following steps:
Run Windows Update, troubleshooter
- Press Windows key + I to open Settings.
- Go to System > Troubleshoot > Other troubleshooters.
- Find Windows Update and click Run.
- Apply any fixes it suggests and try updating again.
Check the internet connection and free disk space
- Make sure you have a stable internet connection while downloading the update.
- Open File Explorer and check that drive C: has enough free space (at least a few GB) for the update files. Delete temporary files or unused apps if needed.
Temporarily disable third‑party antivirus/firewall
- Third‑party security tools can sometimes block updates.
- Temporarily disable your non‑Microsoft antivirus or firewall, then run Settings > Windows Update > Check for updates again.
- Re‑enable your security software after the update finishes.
Repair system files with SFC and DISM
- Type cmd in the Start menu, right‑click Command Prompt, and choose Run as administrator.
- Run these commands one by one:
sfc /scannowDISM /Online /Cleanup-Image /RestoreHealth
- Restart your PC and try installing KB5094126 again from Windows Update.
Install KB5094126 using the offline installer
- Go to the Microsoft Update Catalog website.
- Search for KB5094126 and download the package that matches your Windows 11 version (24H2 or 25H2, x64/ARM64).
- Double‑click the downloaded .msu file to start the installation.
- Restart your PC when prompted.
If the update still fails after these steps, note the exact error code shown in Windows Update and search for it or mention it in the comments for more specific troubleshooting.
Frequently Asked Questions
KB5094126 is the June 2026 Patch Tuesday cumulative update for Windows 11 versions 25H2 and 24H2. It includes important security fixes, quality improvements, and several new features designed to improve performance, accessibility, and overall system reliability.
Yes. KB5094126 is a mandatory security update released as part of Microsoft’s June 2026 Patch Tuesday. It contains security fixes along with non-security improvements and bug fixes.
After installing KB5094126, your Windows 11 version will be Build 26100.8655 (for 24H2) or Build 26200.8655 (for 25H2). You can confirm this by running winver.
Microsoft is using Controlled Feature Rollout (CFR) to gradually release some new features. As a result, certain features may not appear immediately on all devices even after the update is installed.
On most modern PCs the update usually takes 10–30 minutes depending on your internet speed, disk performance, and how many previous patches are missing. During installation, your PC may restart several times — this is normal, just avoid turning it off until the process completes.
Yes. You can uninstall it from Settings → Windows Update → Update history → Uninstall updates if you face any issues. However, uninstalling security updates is not recommended as a long‑term solution. Use it only for troubleshooting and reinstall the update when possible.
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