Of course viruses also a cause of damages, but I do not agree that each and every problems faced in the world of computers are due to virus.
Most problems people have with computers are simply their own fault. For example, they accidentally delete all the files in their current directory rather than in another directory, as they intended or they improperly switch off, rather than shutting down which may cause files to get corrupted. Most of the people by over confidence fail to back up their work on a regular basis . This can easily turn a serious problem and costs thousands of rupees and ones own job. When such a disaster happens, it is human nature to want to find someone or something else to blame, rather than admitting it is your own fault. Viruses have proven to be an excellent scapegoat for all kinds of problems.
Of course, there are times when people want to destroy computers. In a time of gulf war, for example Al-Jazeera satellite channel’s web sites has been defaced during current gulf war which earlier claimed by a COUNTRY as a Propaganda machinery. Although one could smash a computer, or physically destroy its data, one does not always have access to the machine that will be the object of the attack.
In medical science there is say prevention is better than cure, this is applied in the world of computers too. how can you block a kick without knowing from where it is. So I think it is necessary to knowing how a virus works
The idea of a computer program which can take off and gain a life completely independent of its maker is really exciting. developing such a program with a positive attitude can bring a revolution in computer world, it may alter the course of history. After all, many of the most truly useful inventions are not made by giant companies or government organizations, but by individuals who have their heads on something day and night. They think of a way to do something better, and do it, and it changes the world. However, that will never happen if you can’t get the basic information about how something works.