Also called a computer worm. A worm is a malicious software that are designed to spread without needing another program or user action to get them started. As soon as a worm breaches a computer system, it begins propagating. Worms in an From electronic mail. A way to send messages using electroni... Apple computer program that stores names and addresses. It's... More will spread to all contacts in that address book, making them capable of infecting millions of computers very quickly. Some worms have penetrated worldwide computer networks and slowed down the entire A global system of interconnected mass of cables, computers,.... Worms are generally spread through The software that controls the essential functions of the de... vulnerabilities. The best thing you can do to avoid computer worms is to keep your operating systems on all devices updated.