KB5089549

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• April 14, 2026—KB5083769 (OS Builds 26200.8246 and 26100.8246)

• April 30, 2026—KB5083631 (OS Builds 26200.8328 and 26100.8328) Preview

• May 2026 Security Updates​​​​​​​

• [Secure Boot] With this update, Windows quality updates include additional high confidence device targeting data, increasing coverage of devices eligible to automatically receive new Secure Boot certificates. Devices receive the new certificates only after demonstrating sufficient successful update signals, maintaining a controlled and phased rollout. ​​​​​​​

• [Boot manager servicing update]

  • This update improves startup reliability after boot file updates, so devices start normally without entering BitLocker recovery.

  • (Known issue) Fixed: This update addresses an issue where some devices might enter BitLocker Recovery after updating boot files on systems with certain Trusted Platform Module (TPM) validation settings, including invalid PCR7 (Platform Configuration Register 7) configurations. This might occur after installing the April 2026 security update (KB5083769).

• [Connectivity] This update improves the reliability of Simple Service Discovery Protocol (SSDP) notifications to help prevent the service from becoming unresponsive.

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