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Does Your PC Have Worms?
by: Joel Walsh
Worms aren't just for dogs anymore. Find out how to inoculate your computer against these nasty parasites.

What Are Worms?

Worms are descended from viruses and are even nastier. Just as ever stronger doses of pesticide breed ever more resilient locusts, better and better anti-spyware software bred ever more devious viruses.

Finally, some virus designers stopped having their creations infect and take over files the way real viruses infect and take over cells. Instead, they created programs that could stand on their own and cause plenty of trouble without the help of any other software applications. Just worms are independent organisms that can infect a host directly, so do computer worms infect computers directly.

What Do Worms Do?

Worm designers are often even more sinister than virus designers, since worm designers are not just vandals. Worm designers often use their creations to achieve specific goals:

• Backdoor creation. Worms often try to set up another kind of malware, a backdoor. A backdoor is a hidden opening in your network connection that lets the worm send data out and take data in. Practically speaking, the data it's sending out are often spam emails, and the data it takes in are instructions on spam emails to send.

• Denial of service attack. Some worm designers really are vandals rather than profit-hungry con artists sending spam. But their vandalism can be more targeted. They use worms to send out numerous requests to remote computers, such as web servers, in order to overwhelm them and therefore shut them down. This is called a denial of service attack.

• Spyware, Trojan, adware, and virus installation. Worms are often used simply to unleash other forms of malware on a computer that might otherwise block them.

• Information theft and fraud.Worms can multitask in order to set up spyware that gathers sensitive information--often financial information--and then set up backdoors, Trojans, viruses, or dialers to disseminate the stolen data.

How Do Worms End Up on a PC?

Worms enter PCs just as viruses, spyware and other malware do: any way they can! Some favorite points of entry for worms:

• Websites can actually download software to your computer without you realizing it. This software includes not only worms, but also spyware, adware, viruses, and other malware. These malware programs find their way into websites either by the deliberate design of the site owner or because hackers have installed the software on the website's server.

• Peer-to-peer file-sharing networkscontain many nice-enough-looking files that are really worms. One of the sneakiest disguises is a filename that indicates the spyware is really a video of a beautiful actress.

• Email, the favored route of viruses, can still be exploited by Spyware. But since new email programs usually block the automatic opening of file attachments, this is less of a problem than it used to be.

• Any internet connection inevitably lets data flow both in and out, and so is vulnerable to attacks by worms.

How Do You Get Rid of Worms?

There's really only one good way to make sure your computer is rid of worms: scan it with multiple antivirus and anti-spyware programs using a full-system scan. Worms are tricky, so anything less than a full-system scan might let them escape. Worse, with new worms coming out all the time, some antivirus and anti-spyware packages may not even know about a new worm until after its wreaking havoc on your machine. That's why you should try using more than one antivirus program and more than one anti-spyware program to increase your odds of successfully detecting the malware.

Don't have more than one anti-spyware and antivirus software? You'd better start downloading. After all, worms won't take excuses.

About the author:
Joel Walsh writes for http://www.spyware-refuge.comabout worm removal http://www.spyware-refuge.com?spyware anti virus [Publish this article on your website! Requirement: live link for above URL/web address w/ link text/anchor text: "spyware anti virus" OR leave this bracketed message intact.]


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How Video can be used Effectively Online

A powerful way to convey your communication messages to your audience is to be able to have your promotional video available on your website.

Yet, we have probably all experienced visiting a website and clicking on a video only to have to been irritated that the content is not viewable or that the sound is inaudible. The result is we leave the website in frustration.

So how do you make sure the video content on your website can be watched by your audience? It all boils down to how you want your viewers to access your video file and the level of video quality you want your movie to be played at.

There are two different ways of sharing your video file on the web:

1. Streamable Video

This is where the viewer is able to download sections of your video (otherwise known as "streaming"), while the video is playing. The main benefit of this method is that the user does not have to spend time downloading the complete video before viewing.

There are three major streaming video formats ? RealVideo (RM), QuickTime (MOV) and Windows Media (WMV). These are playable on Real Player, QuickTime Player and Windows Media Player respectively. Windows Media Player is widely available on most PC's, as it is part of Windows Operating System. The other players need to be installed.

The only negative with streamable video is that the quality of the video is dependent upon Internet connection. In addition, it has the annoying habit of dropping video frames because the streaming software has to adjust the data rate based on the speed of your Internet connection, in order to keep playing the video.

2. Download and Play

This is where the viewer needs to download the entire video first, then play it on their video player application. The main advantage is that the video quality is not affected by Internet connection speed.

However, it can take some time for the video to download if the file is large.

So which format do you choose?

In a world where first impressions always count, it is extremely important for companies to appear professional and trustworthy at all times. Marketing videos with poor picture quality are likely to reflect a poor quality company in the mind of the viewer. Consequently, we always recommend the download and play option. This is because it allows for high quality video content to be viewed.

However, as you don't want viewers to give up on downloading your video, we only recommend that short video clips are inserted onto your website.

This means your website users will be able to download a short video at a high quality picture resolution that will portray your company in the best possible way.

(c) Marie-Claire Ross 2004. All rights reserved.

Marie-Claire Ross is one of the partners of Digicast. Digicast works with organisations who are not satisfied that their marketing and training materials are helping their business grow. She can be contacted on 0500 800 234 (Australia wide) or at mc@digicast.com.au. The website is at http://www.digicast.com.au.

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