Secure Boot

Microsoft

Windows Secure Boot certificate expiration and CA updates - Microsoft Supportsupport.microsoft.com

Act now: Secure Boot certificates expire in June 2026 - Windows IT Pro BlogTECHCOMMUNITY.MICROSOFT.COM

Secure Boot playbook for certificates expiring in 2026TECHCOMMUNITY.MICROSOFT.COM

Dell

DSN-2026-001 Dell Proactive Messaging Regarding Upcoming Microsoft Secure Boot Certificate Expiration | Dell USwww.dell.com

Framework

Windows Secure Boot certificates begin expiring in June 2026Framework Community

HP

https://support.hp.com/us-en/document/ish_13070353-13070429-16support.hp.com

Lenovo

Lenovo Secure Boot Certificate Expiration Guide (2011 - 2023) - Lenovo Support USpcsupport.lenovo.com

Lenovo Secure Boot Certificate Expiration Guide (2011 - 2023) - Lenovo Support USsupport.lenovo.com

Updating Windows Boot Manager and WinPE with the Windows UEFI CA 2023 CertificateLenovo Press

Red Hat

Secure Boot Certificate Changes in 2026: Guidance for RHELRed Hat Customer Portal