About this tag
KB5081151 is a Safe OS Dynamic Update for Windows 11 version 26H1, released by Microsoft on March 26, 2026. This update addresses the upcoming June 2026 Secure Boot certificate expiration by ensuring the pre-boot trust chain remains intact. It is part of Microsoft's broader effort to transition from older 2011-era certificates to newer 2023 certificates across consumer PCs, commercial fleets, virtualized environments, and managed devices. According to Microsoft's support guidance, devices lacking the newer certificates will continue to boot and receive normal Windows updates, but the update helps prepare systems for the eventual certificate change. This tag covers discussions about the KB5081151 update, its role in Secure Boot certificate management, and its implications for Windows 11 users.
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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