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Glossary of Terms


A malicious program. It can illegally and clandestinely embed its copies into other programs.


A malicious program type. It spreads by itself using various computer resources: email, Web sites, IRC channels, local networks, etc.


A malicious program. When started, it performs destructive or undesired actions on the computer.


This virus type modifies its appearance by using encryption methods. Consequently, these viruses contain no constant code blocks at all, which makes it harder for an antivirus program to recognize and remove them.


This virus presents a veneer of temporary recovery to conceal its presence in a system. For example, these viruses temporarily restore the infected file when an antivirus program requests this file. Once the file is checked, the virus infects it again.


This means that a computer virus has made it from the inventors' computer and out to infect computers by itself.


mal in French means “bad.” Malware is bad stuff. It's a term for viruses and their kin.

There are several categories of viruses that produce varying degrees of damage to a computer:

  • Harmless viruses do not affect computer operation in any way except by consuming a portion of the hard drive's free space.

  • Paper-tigers also consume hard drive space but may also produce graphics, sound, and/or other kinds of generally harmless effects.

  • Harmful viruses may seriously interfere with the computer's performance.

  • Hot viruses may corrupt programs, cause data loss, damage files and system areas principal to the computer performance, and even decrease the life of computer hardware.



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