Your PC's critical security certificates may be about to expire - how to check

ZDNET explains that Microsoft Secure Boot certificates issued in 2011 are set to expire in June 2026, potentially preventing affected Windows (and some Linux) systems from booting or receiving pre-boot security updates. Microsoft and OEMs issued replacement 2023 certificates and are deploying firmware and Windows updates to most modern PCs; users can verify their device status with a PowerShell check and should contact their OEM for firmware updates or follow Microsoft guidance if running unmanaged or older hardware. Disabling Secure Boot is a last-resort workaround but can interfere with BitLocker-encrypted disks.