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Join us in May for our fourth Ask Microsoft Anything (AMA) about updating Secure Boot certificates on your Windows devices before they start expiring in June of 2026. If you've already bookmarked Sec...
Heather_Poulsen
Updated May 18, 2026
AMA
Technical Takeoff
wingmanerik's avatar
wingmanerik
Occasional Reader
May 18, 2026

A comment was made regarding bootable media in regards to the secure boot certificates. We have several USB sticks and PEs used to build systems. If the certificates are expired in the boot media / PE, will those stop working completely in June? Or only when the old certificates are revoked?

Thank you!

  • IvanCardim's avatar
    IvanCardim
    Icon for Microsoft rankMicrosoft
    May 18, 2026

    Expiration alone won't impact existing boot media that is working today - they'll only stop working when the 2011 certs are explicitly revoked via a DBX update.