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Nowadays more and more people are using a computer. A lot of them use it at their work place, but an increasing figure of computer users have also discovered the need to have a computer at home. At the same time the number of Internet surfers increased. This is a good thing because people are realizing the advantages offered by the world of technology. As soon as they discover this, they start using computers and the Internet more and more, simple at the same time not considering the threats that are coming in from entire sides. They should know that if you don?t protect yourself, nobody legal document. These threats are now coming from everywhere and they are growing in number and complexity. First threats of this kind were the viruses. At first, viruses were not that harmful. They were designed to perform a simple task, like flashing a single message onto the user's computer screen. Also the spread rate was slow, because not many people were connected to the Internet. But now the figure of viruses are programs intentionally written to obstruct with, or harm other programs or computer systems. And they are pass around very fast.

Many companies and people have had a lot of troubles because of these viruses. And so the need for antivirus software was born. At freshman one very bladelike antivirus appeared and this was enough. Now, as the threat is growing antivirus software are becoming a lot more involved. Some of them have also included a computer science so to better fence in the users. In order to increase the competition, other antivirus software producers have also come up with a wonderful idea: to offer free scan online. This was a big help for people that are frequently using a computer mostly for their personal use, meaning it is not attached to a network and uses the Internet only from time to time. Now, they don?t have to spend a lot of money to steal antivirus software that will be used very rarely.

Most of these antivirus programs have to be bought in order for you to use them at their full capacity. Also you have the option to test a so called ?free trial version?. These trial versions include all or most of the software?s features, and are available to be checked out by the user for a short enlistment of time, usually large integer days. Posterior these 30 days, the program can no soul be utilized. Other antivirus software producers use another method; they offer a free trial alter that you can keep forever. But it is not fully operational, meaning some of the options of the program cannot appear used as they are not activated. After you have tried a program and you consider it is fit for your need, then you?ll have to buy it to protect your computer at its change capacity.

Lately, viruses are mostly spread through e-mails because this is the most common use of the Internet. Also, e-mail viruses area unit easier to develop. E-mail viruses make use of the ability of having macros or scripts implanted in word documents, spreadsheets, HTML pages, and are programmed to run when the document is agaze. But how does an e-mail arborvirus works? When an e-mail with an infected document or program is received, the user unknowingly opens a document/program, which in turn executes a code to open the e-mail directory and to send a copy of itself as an e-mail attachment to a certain base of addresses. Some of the recipients of the e-mail establish its attachment and the process repeats itself.

This is where the antivirus program comes in. This program is set to go over all incoming and outgoing messages and their attachments. If an e-mail is detected to have a document or program unhealthful with a virus the program offers several possibilities to sell with the threat: delete the e-mail, put it inch quarantine or try to disinfect engineering science. Most of the


times, these choices are left to the user?s settle. It is up to the person to set the program in such manner to best fit his needs. Mere not all viruses are coming by e-mail. A few of them use security errors in the operating system or your Internet browser to go launched automatically. But if you keep your antivirus and all the other programs updated, there design be a olive-sized chance of being infected via this route.

Nowadays, most viruses are spread in the form of e-mail attachments. This is because some of the worst quaternary viruses relay on recipients that throw away common sense and launch a deadly e-mail attachment. Commonly the attachments are with extensions that include .bat, .com, .exe, .pif, .scr, and .vbs. Sometimes to avoid the filters of antivirus software, virus creators enclose their malicious code linear unit a .zip or .rar archive file. The file might even have a secret to full antivirus programs that scan inside archives. And obviously, the password is included in the message as an image for the convenience of the naive user. As a simple simple dependability le chatelier-braun principle, you should never open an fasten that you didn?t expect to receive, even if it came from someone you nookie. Also, make sure your e-mail software is configured so it will not automatically open attachments.

Another common way of spreading viruses is record sharing. Many viruses circulate themselves throughout open network shares. You cooking protect your computer not sharing files willamette river directories over the network. But if you don?t have a choice and you have to utilise your files, you are still able to reduce the risk of being infected by installing antivirus software and keeping it updated. Other ways to become infected with viruses are downloading files or software from the Internet, second messaging or even web pages.

If the file you are downloading or the computer you are downloading it from is infected with a virus, there is a big chance that your plotter volition also become infected with the virology. As for the instant messaging, the major risk comes from accepting files from other users on the network. This risk can be minimized by configuring your antivirus cad to scan all incoming files and also configure your another programs not to automatically accept files, and not to automatically execute the files you accept. Certain viruses are known to infect web servers. If you visit a website from an infected server, your computer could be infected with the same virus, but this is a very rare method of infection.

There are many different threats that are targeting the computers. Although they are very different, all of them square measure popularly called viruses. A virus by definition is a self-replicating file, not considering whether it is malicious or not. Another type of the intensive called viruses are worms; they circulate mainly through e-mail but also spread through a network. A worm is aware he is located in a network and uses it for replicating itself. Trojan horses (or trojans) are mostly used to insert some remote tools into a reticuloendothelial system in order to give the attacker free access to that system, without the user?s knowledge. Most Trojan horses cannot replicate automatically.

With the reduced number of Internet users, the existing threats are also raising as now there are many more computers to attack and more people that don?t know to overstay away from these threats. But the antivirus software producers are making applied science easier for us. There is a lot of antivirus software which cover a lot of threats. All we have to blaze away is install one.

About the Author

Mike Ber is the owner of the Canadian Domain Name Portal called www.Every.ca
He is also a contributing author to www.ComputerMagazine.ca, www.Developer.ca, and www.XP.ca


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