According to Wikipedia as of June 2018, 55.1% of the world's population has internet access. In 2015, the International Telecommunication Union estimated about 3.2 billion people, or almost half of the world's population, would be online by the end of the year. But how can you know when we use the internet, the connection between your device and the internet is secure and not tampered. So, getting on the point of accessing the internet can be dangerous, you don't know when and which website contains harmful elements that can create problems for your device. To be sure of these harms like Viruses or hackers. The authority of some good people developed antiviruses and certain measure, when taken can stop your device from hacking and keep your data safe and not infected.
But, how does this antivirus work?
Antiviruses like Mcafee and Norton created by Symantec scan your devices and perform a full finished detailed work on your device to get the information required if it sees any program that is non-existing from your device is literally eliminates that and cont. to another step not only that it performs internet security which prevents you from entering websites that are contaminated with viruses or any other programs that can affect your device.
Antivirus has made our life threat free and made our devices viruses free. Your established internet connection is now safe via these antiviruses. These viruses that threaten to corrupt your data now can be easily removed and deleted before they go further in there task.
Now more about antivirus: norton.com/setup
Viruses are a type of malicious software which runs a program through which they can easily replicate or double up and can develop its own code. After the replication is proceded the program executes itself and affects your device and infects your data. Viruses are projected via websites or apps or any software looking helpful but contain malicious content. Viruses are created to seek profit by selling the victims data or blackmailing him. These viruses cause billions worth of damage per year by causing system failures, data corruption, data trafficking, phishing, etc. The word Virus has been derived from the word Erroneously meaning Malware. Malware has many forms like Computer " Worms, Ransomware, Spyware, Adware, Trojan horse, etc. In the '70s the first virus was projected namely Creeper Virus, it was a self-duplicating program.