By definition, a virus is a computer program which can copy itself and infect other computers. The first, under the articles, seen nearly half a century. The virus was detected in the Creeper ARPANET, a predecessor of the World Wide Web. He has used the modem to use on other computers and when it reached its target, shows the following message: "The Creeper IM: Catch Me If You Can.
Antivirus software is another type of computer programappeared because of the need to disinfect computers from viruses. "The Man" is the first of its kind and the purpose was Creeper virus. Some people said they could share the same designer, but it never was proven.
Since the first anti-virus software, viruses, and methods for rapidly developed. Most of the time, the next step in the evolution of viruses and virus creators to fight evil and to invent new ways to clean the peskybugs.
The common approach to anti-virus software to scan files, memory or records of your computer and detect malicious code. This code is compared with dictionaries virus and a match is found, the antivirus software attempts to clean the suspect, without damaging the original data.
Another method to combat viruses is to monitor computer activity, also known as heuristics. This includes the monitoring of memory ports and road signsinfection.
A modern approach is called "sandbox" approach. It is to run the suspect in a simulated operating system and analyze the results.
Regardless of the method, if a virus is found, first try antivirus to disinfect the file. If it fails, it is the infected file in quarantine (isolation from other programs) or, at worst, be eliminated.
It is very important to have a reliable antivirus program, because it can virus in a file that you upload, in an attachment or a Web site may contain malicious code to infect your computer.
Some programs that are there and can perform all these tasks are free, but most of them require a payment. Almost all the updates to their database of viruses, so that your computer is protected against the latest threats.
AVG Anti-Virus Free, BitDefender Free, Comodo AntiVirus and PC Tools AntiVirus Free Edition is only a couple of freedom> Anti-virus programs available on the Internet.