Detecting of the polymorphic viruses.

Polymorphic viruses are harmful programs that are able to change its code and body in the time of each infection. Standard way of testing computer files is based on comparison of signature of the file and detection of the identical parts. As polymorphic virus constantly changes its part it makes him irresistible for detecting. As a rule for polymorphic virus detection a specially written for each virus programs are used. Only the most skilful and experienced programmers are able to create polymorphic virus's detectors. So you may say 'Thank you" for those, who create polymorphic viruses and so improves the programmers' skills.

We already said that polymorphic viruses are able to codify their parts, more over they are able to do it partially, in addition we have to notice that polymorphic viruses are also able to change the code of codify, and that is another reason of their invisibility. Most of the antivirus programs are helpless in detecting and disposing of polymorphic viruses. For example even the best antivirus software is able to detect only the simplest types of polymorphic viruses. To deal with the problem of polymorphic viruses high-tech programs were designed. Those programs are based on brand new technologies that are have never been used for design of other antivirus programs.

There's such type of antivirus software as heuristic analyzer. Heuristic analyzer is able to detect and dispose not only those viruses that have already been detected and examined but also viruses that may never even exist. In case if you have no opportunity to buy or download heuristic analyzer you may use widely known antivirus programs. For example you may use Aidstest antivirus, but we have to warn you that it can detect only the elemental types of polymorphic viruses. To supply you computer and its operating system with total secure you have to use both Aidstest and Dr.Web.

Actually Dr.Web is a heuristic analyzer; it performs the operating of the programs that are testing under its administration and detects functions that are peculiar for viruses operating. Thanks to this ability Dr.Web is able to detect and dispose the polymorphic viruses just as fest as it detects simple viruses that have no codify-decode generator. Dr.Web performs its functions on the base of heuristic analyze, which usually being used together with scanning, in order to detect polymorphic viruses. Heuristic analyze makes possible the detection of the viruses that are haven't been researched, but in this case disposing of the virus is impossible.

If your heuristic analyzer informs you that disk or file is infected, please pay a good attention to this information. You have to rescan files and programs, which is hypnotically infected. Update your antivirus software and perform antivirus scanning once more and in case if your antivirus software appears to be helpless to heal infected files send the information about virus to antivirus software's creator.