There have been more and more hacker attacks in the last year, and they are getting harder and harder to stop. As the number of businesses grows, so does the number of people who want to “break into” them and steal their money. If you’re going to stop hackers, the best option is to install a professional antivirus, which we will talk about later in this article.How does antivirus know that your file is infected? Antivirus software is designed to spot a piece of code that may be malicious in the file you downloaded. The working principle of antivirus comes down to:1. Monitoring the operation of all programs on the computer2. Scan files3. Monitoring the user’s work on the computer (Internet surfing and downloading)At every moment, the antivirus scans parts of the files on your computer with the malicious virus codes it has in its database. Suppose the software detects any irregularities by scanning the codes inside the files. In that case, it will take specific measures that include notification that the file may be malicious and sometimes will not allow you to download the file itself (depending on the antivirus).When we talk about viruses, it is essential to note that not all viruses are malicious. Some viruses are made purely for fun, but the antivirus certainly notices the incorrect code and notifies the user.How do viruses work, and who makes them? A virus is essentially a program that does something wrong to your computer but is packaged to look like something good. Most often, viruses are used to delete files from your computers or to crash your computer system.However, some programs go beyond that, and with that, we come to eavesdropping, monitoring, recording, and spying on users. It is pervasive for hackers to take away your data and then ask for certain things to return the same data to you.Do I need an antivirus? It depends on what you do on the computer.In 90% of cases, you will not need an antivirus at all. If you are wondering who will protect you from viruses, the answer is in Windows Defender.Windows Defender is a part of the Windows operating system that protects the user from malicious files. It hasn’t done its job very well in the past; however, additional updates and upgrades to the software itself have yielded remarkable results when it comes to security. Defender comes with the operating system, so there is no need to install it later; it works from the moment you install Windows OS on your computer.This Windows add-on will successfully protect your computer if your computer use is reduced to “ordinary” use of the computer. You will need an antivirus if you work with viruses yourself, surf the Deep or the Dark Web, or similar. In all other situations, Windows Defender is sufficient.Does antivirus protect against hackers? In theory, it will. In practice, it depends on how you react to the antivirus notification and what kind of virus it is.If it is a newer virus, even if it is a Trojan, the chances are not very high that you can be sure. Antivirus will prevent you from downloading the file, but you can ignore that notification and download it.Additionally, for someone to hack you, you don’t need to download the file at all. You can be hacked even if you correspond with teammates while playing the game. One of them can find your IP address and start hacking, most often pinging your computer, and antivirus can’t help.What is the best prevention against hackers? 1. Take care of what you download from the Internet. Many applications look nice and attractive, but in fact, they are very insecure. Don’t download things from unverified sites. Make sure that the website from which you download the padlock is always green.2. Don’t download programs via torrent and pirate sites if you don’t know how to do it properly.3. Do not connect untested devices to your computer. Many viruses were transmitted through an “infected” USB flash drive.4. Do not turn off Windows Defender, even if you have downloaded an additional antivirus.5. Do not click on ads on suspicious sites, nor visit suspicious sites. Make sure you turn on SafeSearch in your browser settings.6. Be sure to constantly update your system and applications to have the latest security patch.7. Do not connect to public Internet networks. Especially avoid WiFi at the bus station, airport, school, and all significant facilities as these are the main targets of hackers.8. Do not reply to e-mails of suspicious origin, but report them and delete them as soon as possible. Also, do not click on links sent to you by people you do not trust.9. Do not log in everywhere with your main account. It’s a good idea always to have a backup account that will only be used to log in to various sites to secure your essential data.10. Do not search the Deep or Dark Web and similar sites unless you are familiar with them. I want to download an antivirus, which one should I choose?At the very beginning, we should say that there are paid antiviruses and those free.The research can lead to the following conclusions:- If you want a free antivirus, know that it will work well and will not burden your computer, but there are risks that it will not fully protect you.- If you decide on a paid antivirus, security will be at the highest level, but you should keep in mind that such an antivirus will put a little more strain on your computer, considering that it constantly scans everything you do to the maximum.Whatever you choose, it’s not a wrong decision. A harmful and fatal decision is to click on the first ad or a warning on the browser where it says that your computer is infected so that you can clean it urgently by clicking on the ad. It’s true that your computer is not infected and that by clicking on the ad, you will infect it.An interesting fact The first virus ever made ironically was called “I Love You. ” It was created on 05.05.2000. The principle of operation is too simple.You would receive an e-mail from one of your contacts with the title “I love you. ” The e-mail would contain a file with the message “This is my love letter to you, please read it.” No one could know about viruses then, and everyone would like to see a love letter from their contact. What absolutely no one noticed is that the file had a weird name “LOVE-LETTER-FOR-YOU.txt.vbs”, so it wasn’t a .txt file at all, the file is a script that would immediately find your contacts and automatically send them a copy of itself, while it would start destroying your data.Many corporations had a significant problem with this virus and stopped using the mail service until the issue was fixed.Behind the virus was a young student whose undergraduate thesis had a similar code and said he created the file to have access to the Internet that other people worldwide use because he didn’t have the money to pay for his Internet. He has never been punished or convicted because the state he is from still did not have legal regulations related to cybercrime.