As the name suggests a boot sector virus affects the boot section on your computer. Evidently, boot sector is the section which is accessed at the very first when the computer is turned on. It is used to boot the information used by the operating system. A Boot sector virus gains complete control over the Master Boot Record (MDR) or the DOS by replacing the contents of the OS with that of its own resulting in errors during booting or ‘cannot boot’ message. Michelangelo and Stones are some examples of boot sector viruses. Earlier, before the era of modern, heavy memory computers, floppy disks were used to boot the system. With the decline of floppy disks, boot viruses have declined as well.
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