Computer viruses are most commonly passed through interaction over the internet, whether they are attached to (or are disguised as) downloaded files or emails sent from friends with already compromised systems. Viruses can be passed from computer to computer without the owners knowing they are passing them along.
There are 3 basic types of viruses: Trojan Horses, Worms and Email Viruses.
Trojan Horses – A Trojan – named after the Greek army’s tactic of hiding their soldiers in a giant wooden horse that was sent as a gift to the city of Troy (In Homer’s epic Illiad) – disguises itself as a document or file of interest, e.g. a sound-bite or song for a music lover, a new patch for an MMO or game for gamers or a picture/video. These viruses do not multiply but rather make your computer’s protection weaker and thus makes your system more susceptible to viruses and other kinds of malicious software.
Worms – The Worm-style of virus is a program that, once inside your system, multiplies and scans for flaws or loop-holes in your security systems and protection. The Worm-style virus attempts to spread itself through a large network by taking advantage of the loop-holes and flaws that it finds or sending itself through the intranet of the network to other computers.
Email Viruses – Email viruses use (as suggested by the name) emails to send itself to other computers and spread itself, they often forward themselves from infected computers.
Prevention and protection from these types of viruses... [continues]
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