Viruses are distinguished by the shape of spread in the computer, provenance or types of files that infect. Everyone has the same purpose, to destroy.

The name of the virus began to be used in 1984. By the end of that decade featured the first epidemic viral infections where there were massive viruses Brain, Bouncing Ball and Marijuana. These affected the boot.

Virus resident

It is one virus that is hidden in the RAM of a computer, and that affects the programs and files when they are put into operation. Often act according to rules laid down by the creator.

This is one of the most common file viruses and infectious. Some examples of this type of virus are Randex, CMJ, and Meve MrKlunky.

Encrypted Viruses

These types of virus using a technique that is not acting to hide when they are not detected the virus. They can only be discovered when they are executed.

It may belong to other types of viruses such as the polifórmicos, making it more difficult to detect their presence. Elvira and Trile are some of these viruses.

Logical bombs

They are a kind of virus camouflaged that are activated when given a specific order. Its main purpose is to destroy data on a computer or do the most damage possible.

They are not regarded strictly as a virus because it does not have the quality of being able to reproduce. This type of virus is viruses dates like Friday the 13th.

Virus BOOT

They corrupt the system boot drive and prevent its implementation. To remove them should make use of a bootable CD.

They also are called viruses boot. Some of them are Polyboot.B and AntiEXE.

Many forms Virus

They are a kind of virus that increasingly active, do it differently. They generate a lot of copies of itself and are therefore very difficult to detect.

They are very difficult to detect the virus. Some of the best known are polifórmicos virus, for example, Marburg, Satan Bug and the Tuareg.

Worms

They create copies of themselves to a high speed so we can get the system collapsed. In addition, they can reach reproduced without infect any files.

It introduces, among others, via e-mail and through chats. El PSWBugbear.B y el Lovgate.F son algunos de ellos. The PSWBugbear.B and Lovgate.F are some of them.

Trojans

We call them Trojan horse by using a technique very similar to what the Greeks used to storm the city of Troy and finish with the Trojans.

They are entered into a computer program by alien and gain control. Its main means of access is the Internet. Its effects can be very dangerous.

Spyware

They are the type of viruses and Trojan horses do not cause serious damage to the system. They record the activities online user's computer which are, for example, accessing data and personal habits.