Virus

Updated 31 Jul 2026

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def
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  malware that can reproduce itself, but needs the user to execute a program — it spreads through file systems or the network, and just running an infected program can spread it further
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impact
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  may or may not cause visible problems — some are invisible, some are merely annoying, some are destructive
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types
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  program viruses — embedded as part of an application
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  boot sector viruses — infect the boot process, before the OS even loads
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  script viruses — operating system or browser-based
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  macro viruses — common in Microsoft Office documents
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related
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  Malware
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  Worm
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  Fileless Malware
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cards
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  Name the 4 types of viruses
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    Program, boot sector, script, macro

Linked references 3