A boot loader is a type of program that loads and starts the boot time tasks and processes of an operating system or the computer system. It enables loading the operating system within the computer memory when a computer is started or booted up. A boot loader is also known as a boot manager or bootstrap loader.
To start up windows and boot the system to make sure no hackers or viruses are on windows so your computer does not get infected with a hacker or virus
A flash drive, it can be put into a USB port and the computer will register it and you should be able to pull up anything you store on it on a another computer or device you are using.