Windows 11 Dev Build Enhances Secure Boot Monitoring and Storage Controls

Key Takeaways

• Microsoft has released Windows 11 Insider Preview Build 26300.8170 to the Dev Channel.
• The update significantly enhances Secure Boot monitoring within the Windows Security application, offering immediate, color-coded status checks.
• Key improvements also include an increased FAT32 formatting limit to 2TB and various storage performance optimizations.
• The enhancements aim to provide greater transparency for critical firmware security and address long-standing usability issues for power users and administrators.

Windows 11 Dev Build Bolsters Secure Boot Visibility and Storage Capabilities

Microsoft has rolled out Windows 11 Insider Preview Build 26300.8170 to its Dev Channel, introducing substantial upgrades to Secure Boot monitoring, storage management, and the overall Feedback Hub user experience. This update is poised to offer users and administrators greater control and transparency over crucial system functions.

Enhanced Secure Boot Monitoring for Firmware Integrity

The most significant security enhancement in this preview build is a comprehensive overhaul of the Secure Boot interface, integrated directly into the Windows Security application. Users can now navigate to Windows Security > Device Security > Secure Boot to find a new, intuitive display.

This updated view employs color-coded icon badges—green, yellow, and red—alongside descriptive text to clearly communicate the device’s current Secure Boot state and certificate validity. This functionality is directly linked to Microsoft’s ongoing initiative to deploy updated Secure Boot certificates for consumer devices and specific business PCs.

Previously, users might only become aware of Secure Boot issues upon system failure. Now, they can proactively verify the status of their device’s certificate. For enterprise environments, this enhanced view is disabled by default on IT-managed devices and servers to prevent potential disruptions. This change provides both end-users and security professionals with immediate, at-a-glance insight into a fundamental firmware-level security control, an area that has historically lacked clear visibility within the Windows operating system.

Significant Storage Improvements and Usability Fixes

Beyond security, Build 26300.8170 introduces several impactful changes to storage management. A major development is the increase in the FAT32 volume formatting size limit via the command line, which has been expanded from 32GB to 2TB. This long-awaited change addresses a persistent frustration for system administrators and power users, significantly broadening FAT32’s practical application for large removable drives and diverse cross-platform storage scenarios.

Additional storage-related enhancements include:

• Improved navigation performance when accessing storage details for large volumes under Settings > System > Storage > Advanced Storage Settings > Disks & Volumes.
• Refined User Account Control (UAC) prompt behavior on the Storage settings page, where the prompt now only appears when attempting to access temporary files, rather than immediately upon opening the page.

Furthermore, a bug that caused Settings > Network & Internet > Data Usage to display inaccurate and excessively large values in recent builds has been successfully resolved in this release.

Feedback Hub and Rollout Details

The Feedback Hub has also received an update to version 2.2604.101.0, incorporating user-driven design refinements. These include improved default window sizing with persistent session memory, support for mouse back-button navigation, restored visibility of community feedback, and corrected rendering of the upvote button for users with the Chinese display language.

Build 26300.8170 is based on Windows 11, version 25H2, delivered via an enablement package, and is currently accessible to Dev Channel Insiders. It is important to note that many features in this build are deployed through Microsoft’s Controlled Feature Rollout, meaning not all Insiders will receive every update simultaneously. Insiders can accelerate feature delivery by enabling the latest update toggle found under Settings > Windows Update.

What You Should Do

• If you are a Dev Channel Insider, ensure your system is updated to Build 26300.8170 to access these new features and improvements.
• Regularly check the Secure Boot status in Windows Security > Device Security to verify the integrity of your firmware and certificates.
• For administrators managing enterprise devices, be aware that the enhanced Secure Boot view is disabled by default on IT-managed machines to prevent disruptions; consider enabling it selectively after testing.
• Leverage the increased FAT32 formatting limit for larger removable drives if your use case demands cross-platform compatibility or specific legacy system support.

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