The company ESET, based in Slovakia, has announced finding the first-ever UEFI rootkit in the wild [thehackernews.com]. Once infected with the malware the only option is to reflash the SPI firmware or else replace the whole motherboard. UEFI [techrights.org] is an overly complex replacement for BIOS, and is often conflated with one of its payloads, Restricted Boot aka Secure Boot.