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"A virus is a type of program that can replicate itself by making (possibly modified) copies of itself. The main criterium for classifying a piece of executable code as a virus is that it spreads itself by means of 'hosts'.

A virus can only spread from one computer to another when its host is taken to the uninfected computer, for instance by a user sending it over a network or carrying it on a removable disk. Additionally, viruses can spread to other computers by infecting files on a network file system or a file system that is accessed by another computer.

Viruses are sometimes confused with worms. A worm, however, can spread itself to other computers without needing to be transferred as part of a host. Many personal computers are now connected to the Internet and to local-area networks, facilitating their spread.

Today's viruses may also take advantage of network services such as the World Wide Web, e-mail, and file sharing systems to spread, blurring the line between viruses and worms."

(Wikipedia)

Virus Information

Google Directory

Panda Software:

Virus Course

This is a two-hour basic course, through which you will acquire a basic knowledge on viruses and on how to be protected against them.
The course consists of twelve chapters:

1. The beginning.
   
2. Basics.
   
3. Viruses and their effects.
   
4. Types of virus.
   
5. Example of virus.
   
6. Example of hoaxes.
   
7. Virus entry-points.
   
8. What is an antivirus program?
   
9. How to combat viruses?
   
10. Is my computer protected?
    
11. Suspected virus infection?
    
12. Some tips.

Labels: Vista, Windows