Anti-virus, in contrast to other malicious programs like spyware, worms, adware, rootkits, phishing and Trojan horses, viruses, computer programs, the files have uncanny ability to proliferate to infect system and various attributes which are transmitted over networks ,, e-mail, instant messaging, file sharing channels as well as removable media such as floppy disks, CDs, DVDs or USB sticks. Some computer virus infection symptoms show that theFinally, the user's computer will be noticed by most. However, the vast majority of computer viruses are sent to the surreptitious and claims that enough remains undetected for irreversible damage. These are the reasons that anti-virus software products are important, so crucial.
Anti-virus software programs were created originally to the 1980s against the computer viruses that started in spreading. Today's complex anti-virus software programs arefertile and therefore able to detect and remove viruses, together with all other harmful malware;. In search of malware anti-virus software programs quarantine or files to encrypt the infected, to render them inaccessible or ineffective, they will try to repair files by removing the malware, but successfully carried out are still not, or they are delete all the infected files from the system.
The anti-virus software programsare many and they all use one or more of the following three methods for identification of malware: The most commonly used signature-based detection, this method breaks files on some segments and compares contents of each of these segments against a dictionary. Virus signatures, which is essentially a list of known virus code. This method is somewhat limited as it can only run a comparison against known viruses and is therefore not in a positionto recognize them for anything new. Anti-virus software detection, is based on the signature-based method requires frequent updates to its virus signature dictionary, and it is set up to examine all files when the operating system of the computer creates, opens, closes or e-mail.
The malicious activity detection method monitors the behavior of all programs and thus provides protection against new viruses. Any suspicious behavior is reportedthe computer used to decide the way forward - to reject or accept. The heuristic-based detection methods used by the higher end and most advanced anti-virus software and it is intended to identify new and unknown viruses.
To fulfill its task of antivirus software that uses heuristics - based detection method uses one of two techniques: a) analysis file - it analyzes suspicious files and virus-likeInstructions that can significantly slow the computer is shut down or b) file-Emulation - it runs programs in virtual environments is their actions and performances, and then determines whether these programs are malicious or not.
Needless to say, best anti virus softwareand the one who is effective, the most that which uses a combination of several of the above methods. After all the anti-virus software, it is about protection from anti-virusComputer infiltration and those maintaining security.
