Microsoft expands Secure Boot 2023 certificate update to most Windows 11 and Windows 10 PCs

Microsoft has expanded the rollout of the Secure Boot 2023 certificate update (KB5094126) to most Windows 11 and Windows 10 PCs via the June 2026 Patch Tuesday update. After nearly two years of cautious, phased deployment held back by firmware compatibility checks, the vast majority of supported consumer PCs are now in the high confidence category, meaning the certificates are either already applied or rolling out automatically. The article explains how users can verify their Secure Boot status and what IT administrators need to do to manage the update.