Computer viruses are getting more prevalent. It is impossible to prevent contact with them unless your computer lives in an isolated glass bubble. Just as human viruses are spread from person to person, computer viruses are spread from computer to computer.
But what is a virus? A virus is a piece of code (software) that attaches itself to a file. Your computer can get infected by having an infected file loaded on to it. So, for example, if you receive files in emails, download things from the web, or have friends who put their pen drives in your USB then you are at risk



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