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In computer programming, a “virus” is a piece of code that may be linked to other programs or files. They are hidden until activated, and they can do anything from corrupting data to sending e-mails that overflow inboxes and erase the hard drive. Computer viruses go through four phases (inspired by biologists’ classification of a real-life virus’s life cycle).
However, most people do not develop viruses to eliminate. There are a variety of reasons. One reason is bragging rights. For instance an infant who folds his paper plane in a creative and clever method to test how far the plane can fly before it is destroyed. Another reason is the same psyche that motivates arsonists and vandals — some people are enticed by the thought of attacking other people’s property. For a certain type of programmer, a powerful computer virus can be an Mount Everest, and they’re compelled to discover how far they can spread it while being able to stay out of the way.
Certain viruses have polymorphic code that alter slightly each time they infect a program or file. This makes it difficult for anti-virus companies to discover and eliminate all copies of the virus from a system. Other viruses rely on the presence of a “trigger” to start spreading, for example, an action taken by the user or a timed countdown (to obfuscate the origin of the virus).
There is nothing you can accomplish through the creation of a virus, trojan or worm, or any other malicious software to take revenge or payback, or to play pranks. You are likely to be charged with a crime. you will be charged. Take a look at alternatives which are more fun and safer than creating an unintentional program that can cause significant damage, or even wipe your entire hard drive.