An antivirus is a type of computer program that stops harmful software, called viruses, from entering computer systems and other digital devices (including smartphones, wearables, and others) without the owner’s permission. They constantly search for, detect and intercept programs they consider dangerous, and prevent them from doing harm to your computer. These days, the term “antimalware” is used instead of “antivirus”.

Installing an antivirus is like hiring a security guard to watch over your home. The guard only lets in the people you have approved and keeps out or drives away unwanted guests.

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