Microsoft has released the Windows 10 KB5094127 extended security update, which addresses vulnerabilities identified during the June 2026 Patch Tuesday and enhances monitoring of updated Secure Boot certificates. Users on Windows 10 Enterprise LTSC or enrolled in the ESU program can install it via the Windows Update settings. The update upgrades Windows 10 to build 19045.7417 and Windows 10 Enterprise LTSC 2021 to build 19044.7417. It focuses on security enhancements and bug fixes, resolving a total of 200 vulnerabilities, including three zero-day flaws. Key features include improved File Explorer search functionality for Chinese text and UTF-8 encoded files, dynamic status reporting for Secure Boot states, a new policy setting to limit Secure Boot service data sent to Microsoft, and enhanced targeting data for automatic receipt of new Secure Boot certificates. A known issue may cause BitLocker recovery notifications on certain systems, particularly those with specific BitLocker Group Policy settings. Microsoft recommends removing the Group Policy setting and suspending/resuming BitLocker as a temporary fix.