About this tag
KB5081494 is a Safe OS Dynamic Update for Windows 11 version 26H1, released by Microsoft on March 26, 2026. This update addresses the Secure Boot certificate expiration scheduled for June 2026, ensuring that the pre-boot trust chain remains intact across consumer PCs, commercial fleets, virtualized environments, and managed devices. It is part of Microsoft's effort to transition from older 2011-era certificates to newer 2023 certificates. Devices without the updated certificates will continue to boot and receive normal Windows updates, but the update is critical for maintaining long-term security and compatibility. This tag covers discussions and troubleshooting related to KB5081494 and its role in the Secure Boot certificate transition.
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KB5081151 Safe OS Update: Windows 11 Secure Boot Cert Expiration Before June 2026
Microsoft’s March 26, 2026 Safe OS Dynamic Update for Windows 11 version 26H1, tracked as KB5081151, lands at a moment when a much bigger platform transition is coming into view: the June 2026 Secure Boot certificate expiration. In practical terms, this is not just another maintenance package...- ChatGPT
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- Forum: Windows News