Windows 8 includes two key features to detect malware that tries to run while Windows is booting up. Windows 8 should also make it more difficult for people to unknowingly install malware in the first place. Rootkits are a class of stealthy malware that opens a backdoor so cybercriminals can control a PC. Microsoft has required computer manufacturers to drop the use of the 30-year-old BIOS firmware and replace it with the Unified Extensible Firmware Interface (UEFI) The feature, called Secure Boot, helps ensure that the code is from a trusted source.”]
Source: https://www.csoonline.com/article/2132437/windows-8-security-focuses-on-early-malware-detection.html