Cybersecurity Glossary: Terms Explained in Plain English | TecnetOne

What Is a Boot Sector Virus? Definition | TecnetOne Glossary

Written by Tecnet One | Oct 9, 2026, 6:49:31 PM

A boot sector virus is a type of malware that infects the area of a disk a computer reads at startup, such as the MBR (master boot record), so it loads before the operating system. It once spread through floppy disks and USB drives; its modern variants, known as bootkits, target UEFI (Unified Extensible Firmware Interface) firmware.

How TecnetOne handles it: Managed Endpoint Protection

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