MS-DEFCON 4: Secure Boot expiration deadline
ISSUE 23.25.1 β’ 2026-06-23 By Susan Bradley Tomorrow is the drop-dead date. Tomorrow, June 24, 2026, the Microsoft Corporation KEK CA 2011 certificate will expire. But your computer will still boot. Life will go on. The sun will rise. On June 27, 2026, the second certificate will expire for the Microsoft UEFI CA 2011 certificate. [β¦]