virus is one type of software. Too bad, that one type of software is almost total impact and aimed at things that are harmful to the users computer. Computer viruses have various basic skills including the ability to manipulate, the ability to reproduce themselves, and so on.
The virus works by utilizing the functions of the hidden operating system or also take advantage weakness / bugs that have a specific program. Creating a virus requires knowledge of how computer systems work and programming capabilities. Some libraries sources classify viruses based on certain criteria, usually for each type has its own characteristic common. This is what needs to be noted so that we can take reasonable precautions against viruses attack computers.
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