What are Trojans, Viruses and Worms?

Viruses, Trojans, Worms and other cyber threats are now a part of daily life. Malware spreading throughout the Internet, hackers stealing confidential data and mailboxes flooded with spam are the price we pay for computing convenience. Any unprotected computer or network is vulnerable.

A computer virus is a computer program that can copy itself and infect a computer without the permission or knowledge of the user. The term “virus” is also commonly but erroneously used to refer to other types of malware, adware and spyware programs that do not have the reproductive ability. 

The name “Trojan” came from The Greek Methology “Trojan Wars”. in the context of computing and software, describes a class of computer threats (malware) that appears to perform a desirable function but in fact performs undisclosed malicious functions that allow unauthorized access to the host machine, giving them the ability to save their files on the user’s computer or even watch the user’s screen and control the computer.

A computer worm is a self-replicating computer program. It uses a network to send copies of itself to other nodes (computers on the network) and it may do so without any user intervention. Unlike a virus, it does not need to attach itself to an existing program. Worms almost always cause at least some harm to the network, if only by consuming bandwidth, whereas viruses almost always corrupt or modify files on a targeted computer.


How can I protect my computer from these attacks?

Although these threats can’t be avoided, you can still protect your computer systems by doing the following:

1. Install an Anti-virus Software.

Make sure that you have an anti-virus software installed in your PC. There are lot of Free Antivirus Software that you can download from the web. Here’s are some:

AVG Free Edition – Protection against viruses, spyware, adware and trojans.
Kaspersky - scans your computer for malicious code and offers the same
exceptional detection rates as other Kaspersky Lab products
Avira AntiVir Personal – from Avira GmbH protects you computer against viruses,
malware, adware and spyware, unwanted programs and other dangers. This manual
deals with viruses and software in brief.

2. Security Updates.

Your operating systems offers you a free security updates on regular basis. Just make sure that you download it and install it to your system.

Microsoft Security Updates

Apple Security Updates

Red Hat Security Updates

3. Don’t open or download software from an unreliable sources.

Usually, you can get Trojan Horses from unsolicited emails with file attachment. Always make sure that you only open attachment from a reliable source. Avoid opening any executable file from emails or downloading it using P2P applications such as limewire or bearshare. Here’s are some extension name you should avoid downloading:

exe, com, bat, vbs, js, and inf file extensions

Note:

If you are using removable drives such as USB Flash drives… Make sure that you scan it first and avoid opening it from auto run or auto play.

4. Use An Anti-Spyware software if your connected to the internet.

Lastly, use an Anti-Spyware software to protect you when accessing the internet.

Here are some example:

Windows Defender - It’s free for Microsoft Genuine Windows User.

AVG Internet Security - It’s USD 54.99 but a complete and reliable solution.

Norton 360 - Protects your PC, online activities and your identity 24/7 – Delivers award-winning protection against viruses, spyware, worms, phishing, hackers, and more in one complete, fully automated solution.  USD $79.99

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Jhong Medina

Hi, I'm Jhong Medina, I'm your friendly neighborhood tech blogger. Please feel free to post your question in any of my topics. Hope you can join and share your ideas, too.

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  • tintin

    wat if ur computer is already infected with virus how can i treat it

  • http://www.qlickcafe.com/blogs/ Jhong Medina

    Hi Tin,

    Thanks for commenting. If you have been infected … We need to determined what kind of virus that cause damage to PC. As precautionary measure I would suggest that you backup all your important files that you have.

  • shaggy

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