Microsoft has released the June 2026 security update for Windows 11, identified as KB5094126. The mandatory patch introduces the Low Latency Profile, expanded Shared Audio capabilities, and a new multi-app camera mode. Users can install the update via Windows Update or download the offline installer from the Microsoft Update Catalog for systems running version 25H2 or 24H2.
What is included in the Windows 11 KB5094126 update?
The June 2026 update, designated as build 26200.8655 for version 25H2 and 26100.8655 for version 24H2, focuses on performance and peripheral management. According to Microsoft, the update deploys a Low Latency Profile designed to boost CPU frequency briefly during UI interactions, such as opening the Start menu or Quick Settings. This aims to reduce perceived input lag across the operating system.
How does the new Shared Audio feature work?
Shared Audio allows users to stream system sound to two Bluetooth devices simultaneously. Microsoft confirms this relies on Bluetooth LE Audio technology. Users can manage this through the Quick Settings panel, selecting two paired headsets or speakers to receive the same audio feed. This development follows a long-standing limitation where Windows restricted audio output to a single Bluetooth device at a time.
Why is the Secure Boot certificate update important?
Microsoft is pushing a Secure Boot certificate update to more eligible PCs to ensure boot loader security. According to official documentation, the update verifies that only trusted files load during the startup process. While most systems update automatically, Microsoft warns that users with older hardware or specific firmware limitations may encounter a yellow or red alert in the Windows Security dashboard. If a “Requires action” status appears, the company advises users to contact their PC manufacturer for a BIOS or UEFI firmware update.
Can multiple apps access the camera simultaneously now?
Yes, Windows 11 now supports concurrent camera access, a departure from the previous Windows Camera API that restricted webcam usage to a single application. Users must manually enable this in Settings > Bluetooth & devices > Camera by toggling the “Allow multiple apps to use camera” option. This update also includes a basic camera diagnostic tool to assist with hardware troubleshooting.
Comparison of Update Sizes
The following table outlines the approximate download sizes for the June 2026 cumulative update based on system architecture, as reported by Microsoft.
| OS Version | Architecture | Download Size |
|---|---|---|
| Windows 11 25H2 | x64/ARM64 | 5,383.7 MB |
| Windows 11 24H2 | x64/ARM64 | 4,799.2 MB |
Frequently Asked Questions
- How do I install KB5094126 if Windows Update fails?
You can download the .msu offline installer directly from the Microsoft Update Catalog. Note that these files often exceed 5GB. - Does the Low Latency Profile affect battery life?
Microsoft states the profile only boosts CPU frequency for 1 to 3 seconds during specific UI interactions, which minimizes the impact on overall system power consumption. - Can I change my user folder name after the update?
The new ability to choose a custom user folder name applies only to fresh Windows installations performed after the update. Existing user folder names cannot be changed through this setting. - Is the Secure Boot update mandatory?
Yes, it is part of the cumulative security update cycle. If your hardware does not support the update, the system will continue to function, though you may see a warning icon in Windows Security.
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