What is Windows Secure Boot? Here's what to know

PCWorld explains Windows Secure Boot as a critical security feature that acts like a checkpoint, verifying software before Windows loads to prevent bootkit malware infections. The 2011 Secure Boot certificates are expiring by 2026, requiring updates to 2023 certificates for continued protection against startup attacks and future Windows compatibility. Users should check the Windows Security app's Device Security section for warning indicators and update UEFI/BIOS if needed to maintain robust system security. Most people don't spend time thinking about Secure Boot.