Antivirus a. What is a virus?
Basically, a virus is a computer program written by individuals who are using their programming knowledge for negative means. At best, some viruses are simply annoying and even mildly humorous; past viruses have made keyboards beep or caused all the letters in a document to fall to the bottom of the screen. At their most serious, computer viruses can delete your hard drive, permanently incapacitate your entire machine, or send embarrassing or slanderous e-mails in your name. These programs resemble human viruses in that their only real purpose is to reproduce and make more copies of themselves. Like organic viruses, they embed themselves in an unsuspecting host (your computer or floppy disk) and can even mutate like a cold or flu.
