Thank you everyone at Microsoft I'm a member of a company that deploys approximately 100,000 Windows PCs. I would like to ask you two questions regarding the expiry of the secure boot certificate. It has been announced that the certificate will expire in June 2026, but it is written in the knowledge that the PC can still be started. Please tell me the reason why I can start up even though the certificate has expired. Also, there is a statement in the knowledge below that a new notice will be given 6 months before the PC will no longer be able to start, but is my understanding correct? Announcement date – implementation phase The enforcement phase will not begin until January 2026, and this article provides at least six months of advance warning before this phase begins. When enforcement phase updates are released, they will include: I'm looking forward to today