In today's digital world, where computers, mobile devices and the Internet have become an integral part in our daily lives, online security is extremely important. As technology developed, this is how increasingly sophisticated forms of cybercrime developed, including viruses, ransomware and many other types of malware. In this environment, antivirus programs play a key role in protecting our computers, mobile devices and data from these threats. A malicious program takes up space on the hard disk or memory unnecessarily (thereby slowing down computer operation, also slows down the connection when we are connected to the Internet), whether it deletes data on computer, or changes them (e.g. financial data) or, perhaps worst, sends important contracts, pictures, personal documents to any e-mail address. An antivirus program or antivirus is a program on a computer that is used to protect, recognition and removal of computer viruses, as well as other malicious programs that can cause problems in the use of the computer or endanger the data.
Antivirus programs are tested and improved daily in order to be as effective as possible in detection of computer viruses. Various techniques and algorithms are used to identify viruses. They consist of key components that are built for the best detection of viruses and malware program. In order for antiviruses to be as efficient and smart as possible, they are often tested, which implies exposure antiviruses against different types of malware to test their capability and detection speed. Manufacturers analyze new malware and its attack techniques to improve their analysis methods. Antivirus performance is also tested in order to checked their speed, resource load on the system and impact of computer operation. That is very important for the user. For performance to be poor and unqualified, for example high system load, the user would not be able to operate the computer due to the bad performance of the antivirus.
Antiviruses regularly scan files on your computer for potentially malicious files programs. They look for specific patterns that are associated with the known viruses they are against tested. If they find an infected file, they notify the user and give the option to remove or Quarantine the file. Heuristic analysis of files allows detection of new and unknown viruses that may not be present recognizable and tested patterns or signatures. The antivirus program analyzes the behavior of the program and looks for suspicious activity that indicates a virus. This includes monitoring running processes, changes in files and the registry (information storage of software programs and hardware device). Antivirus scanning is divided into two categories: general and special. General scanners designed are for finding and disabling all types of viruses for a specific type of operating system, while a special scan finds a limited number of viruses or specific types of viruses, say macro viruses, spyware, ransomware.
Nowadays, it is almost impossible to work on a computer without protection against malicious programs which we can get by opening any page on the Internet or downloading applications. It is necessary to have good antivirus programs so that we do not end up in a situation where we pick up various ones viruses that would delete personal files or simply crash our system. Today we all business operations take place via computer and we do not allow the risk of business interruption. Antivirus programs need to be renewed and updated regularly because millions of new ones are created every day advanced malicious programs.