Viruses, worms and Trojan Horses are all malicious programs that can cause damage to your computer, but there are differences among the three, and knowing those differences can help you to better protect your computer from their often damaging effects.

Virus = A program or piece of code that is loaded onto your computer without your knowledge and runs against your wishes.

Trojan Horse = A destructive program that masquerades as a benign application. Unlike viruses, Trojan horses do not replicate themselves

Worm = A program or algorithm that replicates itself over a computer network and usually performs malicious actions

Blended threat = Blended threats combine the characteristics of viruses, worms, Trojan Horses, and malicious code with server and Internet vulnerabilities .

Is very important to protect your PC with a good anti-virus software installed on your system with the latest fixes for new viruses, worms, and Trojan horses. Additionally, you want to make sure your anti-virus program has the ability to scan e-mail and files as they are downloaded from the Internet. This will help prevent malicious programs from even reaching your computer. You should also install a a system that prevents unauthorized use and access to your computer (firewall as well). A good software firewall will protect your computer from outside attempts to control or gain access your computer, and usually provides additional protection against the most common Trojan programs or e-mail worms.

A firewall is a system that prevents unauthorized use and access to your computer. A firewall can be either hardware or software. Hardware firewalls provide a strong degree of protection from most forms of attack coming from the outside world and can be purchased as a stand-alone product or in broadband routers.

Unfortunately, when battling viruses, worms and Trojans, a hardware firewall may be less effective than a software firewall, as it could possibly ignore embedded worms in out going e-mails and see this as regular network traffic. For individual home users, the most popular firewall choice is a software firewall. A good software firewall will protect your computer from outside attempts to control or gain access your computer, and usually provides additional protection against the most common Trojan programs or e-mail worms. The downside to software firewalls is that they will only protect the computer they are installed on, not a network.

Sometimes it's tough to sort out all the details related to this subject, but I'm positive you'll have no trouble making sense of the information presented above. Take the advantage of learning about them and of discovering how they work.

It is important that you know how to utilize these information correctly. Studying and understanding them deeply is the key to make them work for you.

Don't limit yourself by refusing to learn the details about Viruses, Worms and Trojan Horses The more you know, the easier it will be to focus on what's important.

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