What is Antivirus ?
Causes and Effects
Nowadays most people use a computer. Most of them use it where they work, but an increasing number 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 see the benefits that the world of technology offers. As soon as they discovered this, they began using computers and the Internet even more, but at the same time without thinking about the threats coming in from all sides. They should know that if you do not protect yourself, no one will protect you. These threats are now widespread and are increasing in number and complexity. The first threat of this kind was a virus. At first, germs were not so dangerous. They are designed to perform a simple task, such as highlighting a single message on a user’s computer screen. And the spread rate was slow, as not many people are connected to the Internet. But now most viruses are programs that are deliberately designed to disrupt, or damage, certain programs or computers. And they are spreading very fast.
Many companies and individuals have had many problems because of these viruses. And so the need for anti-virus software has been born. Initially another simple antivirus appeared and this was enough. Now, as the threat grows the antivirus software becomes more and more difficult. Some of them have even installed a firewall to better protect users. To increase competition, some antivirus software manufacturers also came up with a good idea: to offer a free online scanner. This has been very helpful for people who often use the computer, especially for personal use, which means that it is not connected to the network and uses the Internet only occasionally. Now, they don’t have to spend a lot of money to buy anti-virus software that will be widely used.
Most of these antivirus programs must be purchased in order to use them to the full. You also have a test option called “free trial version”. These types of trials include all or most of the software features, and are available for short-term user testing, usually 30 days. After these 30 days, the system will no longer be used. Some manufacturers of antivirus software use an alternative; they offer a free trial that you can keep forever. But it is not fully functional, which means that some system options cannot be used as they do not work. After you have tried the program and think it suits your needs, you will need to purchase it to fully protect your computer.
Recently, viruses have become increasingly common through email because this is the most common use of the Internet. Also, it is easy to develop e-mail viruses. Email viruses use the ability to embed macros or texts into text, spreadsheets, HTML pages, and are configured to open when a document is opened. But how does the email virus work? When an email with an infected document or program is detected, the user unknowingly opens the document / program, which creates a code to open the email directory and send a copy of it as an email attachment to a specific number of addresses. Some email recipients open the attachment and the process repeats itself.
This is where the antivirus program comes in. This program is set to check all incoming and outgoing messages and their attachments. If an email is found to be infected or infected with this virus, the program offers many opportunities to deal with the threat: delete the email, separate it or try to remove it with the virus. Most of the time, this option is left to the user’s decision. It is up to the user to set the system that way so that it fits best with his or her needs. But not all viruses come via email. A few of them use security errors in your operating system or Internet browser to launch them automatically. But if you keep your antivirus and all other programs updated, there will be less chance of infection this way.
These days, most viruses are still transmitted via email attachments. This is because some of the most recent viruses are transmitted to mindless recipients and start fatal email attachments. Usually attachments have extensions that include. Bat, .com, .exe, .pif, .scr, and .vbs. Sometimes to avoid antivirus software filters, virus creators insert their malicious code into an .zip or. The file may have a password for full antivirus programs that scan inside the archives. And apparently, the password is included in the message as a picture of the ease of use of the inexperienced user. As a simple but reliable rule, you should never open an attachment that you did not expect to receive, even if it came from someone you know. Also, make sure that your email software is set up so that the attachment will not open automatically.
Another common way to spread viruses is to share files. Many viruses spread throughout the open network shares. You can protect your computer from sharing files or directories on the network. But if you have no choice and you have to share your files, you can still reduce the risk of infection by installing anti-virus software and keeping it updated. Other ways to become infected are to download files or software from the Internet, instant messaging or web pages.
If the file you are downloading or the computer you are downloading is infected, there is a high chance that your computer will also be infected. In the case of instant messaging, the greatest risk arises from receiving files from other users on the network. This risk can be reduced by setting up your antivirus software to scan all incoming files and configure your other programs not to automatically receive files, and to not automatically use the files you receive. Some viruses are known to infect web servers. If you visit a website from a virus-infected server, your computer may be infected with the same virus, but this is a rare form of infection.
There are many different threats to computers. Although they are very different, they are all called germs. A virus by definition is a self-replicating file, not thinking that it is dangerous or not. Another type of virus called worms; they are distributed mainly via email but also spread over the network. The caterpillar knows it is found in the network and uses it to replicate itself. Trojan horses (or trojans) are widely used to install other remote devices in the system to give the attacker free access to that system, without the user’s knowledge. Most Trojan horses cannot replicate automatically.
With the growing number of Internet users, existing threats are also growing as there are now more computers to attack and more people not to distance themselves from these threats. But the manufacturers of antivirus software make it easier for us. There are many antivirus software that includes many threats. All we have to do is install one.