Difference between revisions of "Computer virus"

Revision as of 00:01, November 29, 2012

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-A '''computer virus''' is a piece of unauthorized software added to a computer which automatically spreads itself to other computers. Some viruses do malicious things, such as erasing files or copying sensitive information (like passwords and credit card numbers).
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-==Process of transmission==
-There are three main ways a virus is transmitted.
-#Automatic replication. When you run an infected program, the virus also runs, searching your computer for other programs to infect.
-#By email. When email software is configured to run programs attached to messages, the virus asks your email software to send it to recipients in your address book.
-#Misleading advertising. A "Trojan Horse" is a program which seems useful, but contains a virus.  The main program may or not perform as advertised, but the distributor knows it is infected.
-A virus which infects networks is called a "worm".
-A Trojan Horse virus typically does not replicate itself but is spread when you copy the program.
-==Anti-virus tactics==
-Configuring your email software so that it never runs attached programs is an easy way to stop email viruses. This should be the default setting, especially for corporate systems.
-Virus scanning software is available from Norton, Symantec and other companies. The software detects the virus and removes it from infected programs.
-It is also prudent to avoid trying out free games and animations available on the Internet. Reputable software companies go to great lengths to ensure virus-free software, so stick to these. Or else, use a separate computer for trials.
-==Terminology==
-Discussion of the virus problem is sometimes hampered by the terminology used by purists, who distinguish between such varieties as "[[Computer worm|worm]]", "[[Trojan Horse]]", etc. But the generic term for unwanted software that infects your computer is "virus".
-==See also==
-*[http://www.howstuffworks.com/virus.htm "How Computer Viruses Work"]
-[[Category:Software]][[Category:Computers]]

Difference between revisions of "Computer virus"

Revision as of 00:01, November 29, 2012

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