Viruses, Email Attachments, Trojan Horses, and worms are examples of things that could be mitigated through layered security. A virus can infect a computer in a variety of ways, the majority of which involve downloading infected files - either intentionally or unintentionally. Pirated music or movies, photos, free games, and toolbars, as well as phishing/spammy emails with attachments, are common offenders.
A computer virus is a type of malicious software, also known as malware, that spreads between computers and causes data and software damage. Virus with Multiple Entities - A multipartite virus is one that can attack both the boot sector and the executable files of an already infected computer.
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