Secure boot is a security measure built into system-level software that prohibits malicious computer viruses from loading during start-up. It is a part of the Basic Input/Output System interface and is independent of the operating system. It is used when a computer's start-up process has become corrupted.
Secure boot is also an option for the upgraded Unified Extensible Firmware Interface in newer computers, as of 2014, which is an upgraded version of the Basic Input/Output System. Secure boot is a relatively new option for correcting a corrupted start-up process, and it applies to Windows computers dating back to 2012. Any modifications to secure boot can only be performed by the manufacturer, which makes it difficult to corrupt.