every person who ever used a computer and or know about computers, must have heard the word computer virus that could attack the computer. Computer viruses sometimes upsetting computer users. Often we hear the word computer viruses, but rarely know what the definition of computer virus itself. But in addition to computer viruses, there is also the type of a program that can damage a computer system, such as trojans, worms, spyware and others. Here are some explanations:
