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What is a Virus?

By Amy Y.Wong
Click Here for her research paper

. . .A computer virus is a program that is self-replicating (copies itself).

Many people believe that any program that does something malicious to a computing system is a virus. This isn't true unless that program can reproduce itself. Computer viruses can cause the loss or change of programs or data. Viruses can spread from one program to another and from system to system.

When the code of a virus is executed, it spreads itself to other programs. A typical computer virus does two things. First, it copies itself into previously uninfected programs. Second, it executes other instructions that the virus creator has included in it. Some viruses don't have any harmful instructions at all. Instead, they cause damage by replicating and taking up disk space. . . (see the above link to Amy Y. Wong's excellent paper for more details).
Windows Virus Security Software Companies


McAfee Anti-Virus(Win95,DOS,Win3.11,Mac)


Updates for Norton Anti-Virus, Central Point, NAV


Dr Solomon's



Inviricible
Invircible Anti-Virus & Virus Trap Anti-Virus


Sophos Sweep Anti-Virus


Leprechaun Virusbuster & Macrobuster Anti-Virus


Safetynet Anti-Virus network protection

(Win95/NT, DOS, 3.11)


PC-Cillin Anti-Virus

Apple Virus Security Companies

Samantec Anti-Virus for Macintosh

Internet Text-only Tour


Virus site in Japanese

http://www.iosnet.ne.jp/anti-virus/

Virus site in English

IBM help for understanding Viruses
http://www.research.ibm.com/antivirus/


Visit YOSHITAKA
UEZUMI'sVirus Page
in Lov-e's Links Index
for more site listings

Virus postings in Japanese


http://www.ipa.go.jp/

SECURITY/index-j.html

Virus postings in English


ANTIVIRUS RESEARCH CENTER
http://www.symantec.com/avcenter/


Apple Virus Security Companies

McAfee Anti-Virus for Macintosh

Samantec Anti-Virus for Macintosh

Disinfectant Anti-Virus for Mac

Gatekeeper for Macintosh
(Discontinued but still available)




Internet Text-only Tour