Steam now offers a quick way to check if your PC has Secure Boot enabled. That's probably not information you care to fill your brain up with right now, but you might need to know it at some point soon as the latest games begin to require it to keep cheaters away.
Secure Boot is a security feature within the UEFI and used for signing Kernel-level code that runs on your PC to ensure it's not, er, dodgy. The idea is, if everyone agrees to sign their code using cryptographic keys, an OS and its apps can be more confident that malicious software is not running in the background, such as a rootkit or low-level cheat software.
