The virus has experienced the development of technology that is big enough, so also have a Antivirus program. Unfortunately, the development of Antivirus usually only pursue development of the virus and not try to forestall. Antivirus behind that (the technology) would be inviting danger for the user.
Antivirus is only able to detect specific types of a virus (and several variants may be) and are usually able to kill the virus in memory. If you find a virus and you believe the name virusnya Antivirus you can use this kind, but if you do not know, should not try. If the virus turns out that another virus is active, which of course is not detected by antivirus, the antivirus is thus able to spread the virus to all who check the program files.
When the virus-detected presence of virus was successful, the virus-the virus that always appear with the new technology is more sophisticated that not be anti-freeze. Antivirus old, for example, can always be'tipu 'with stealth technology, so when trying to detect this antivirus files the other, the stealth virus before it spread itself to every file is checked.
Danger of a more frightening is if an antivirus detects a virus and cleared so that a program file that you try to fix it is to be broken. This incident never happened for example in the case DenHard virus, the virus is really similar to the die hard, but the virus is using a different technique to restore the original header file, some antivirus that is cleared attempt sabotage program files where the virus is located. In addition to going on cases of the virus DenHard, the case had very day (and may still continue to) occur in some viruses. One of the reasons for the virus that make virus-like virus that is difficult to clean, because the antivirus does not like if virusnya can easily be cleaned by the user.
In various media of course you often see an antivirus program "unit" (specific) purpose is to detect one type of virus. Usually, the antivirus does not inform how the right to use this antivirus program, and has a specific antiviral big risk that if not used correctly..
