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Anti-Virusunlike other malicious programs like spyware, worms, adware, rootkits, phishing and Trojan horses, viruses are computer programs that uncanny ability of propagating itself to various system files to infect, and may be transmitted over networks, Internet, e-mail , Instant Messaging, file sharing channels as well as removable media such as diskettes, CDs, DVDs or USB sticks. Some computer viral infections display symptoms that will eventually be noticed by most computer users. However, the vast majority of computer viruses are causing havoc that placement and unnoticed long enough for the damage to be irreversible. Those are the reasons that anti-virus software products are so crucial.
Antivirus software programs were originally created for computer viruses began to spread in the 1980 fighting.
more sophisticated current antivirus software programs are more fertile and thus able to identify and remove viruses, along with all other harmful malware. After finding all the malware, the antivirus software to quarantine or encrypt the infected files inaccessible or ineffective, they will try to recover the files by removing the malware, but this can not always be successfully accomplished or they will completely remove the infected files from the system.
The antivirus software programs are numerous and they are all one or more of the following three main methods for identification of malware: The most common is the signature-based detection method. This method breaks files into small segments and compares the contents of each of these segments against a dictionary of the virus signatures is essentially a list of known virus code.
This method is somewhat limited in the equation can only be carried out against known viruses and will not be able to select one of the new tracks. Antivirus software relies on signature-based detection method requires frequent virus signature updates for the dictionary and was established to examine all files when the computer?s operating system creates, opens, closes or e-mail them.
The malicious activity detection monitors the behavior of all programs and thus provides protection against new viruses. Any suspicious behavior was reported to the computer used to decide how to proceed ? to reject or accept. The heuristic-based detection method was used by the higher end and most advanced antivirus software and is designed to identify new and unknown viruses.
Its task of antivirus software that uses heuristic ? based on the detection method used one of two techniques: a) File Analysis ? It analyzes suspicious files and virus-like instructions that can significantly slow down the computer, or b) File emulation ? it?s running in virtual environments, notes of their actions and performances, and then determine whether these programs are malicious or not.
Needless to say, the best antivirus softwareand one that is most effective, is that using a combination of several of the above methods. After all antivirus software, it?s all about the protection of anti-computer virus infiltration and maintain that security.
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