Antivirus Antivirus is a computer program designed to protect computer systems from viruses and other malware attacks. A virus is a program or code that replicate itself and spread to other computer systems. Virus attacks can cause damage to computer systems, loss of data, or even result in leakage of personal data. Antivirus works by detecting and removing viruses or malware found on computer systems. There are several types of antivirus programs availab including paid and free antiviruses, as well as antiviruses that come wit additional features such as firewall and antispyware protection. The way antivirus works is by scanning the computer system for signs of a virus or malware presence. Antivirus uses a regularly updated virus database compare the signatures found on the system with the virus database. If the antivirus finds signs of the presence of a recognized virus or malware, the program will provide options to delete or move the infected file to quarantine. In addition, antivirus can also work in real time, or real-time, which means that the program will continuously monitor the computer system to detect virus or malware threats when they occur. This allows the antivirus to immediately deal with threats and minimize damage to the computer system. There are several factors that can influence the effectiveness of an antivirus, one of which is a virus database that is updated regularly. The more often the virus database is updated, the more types of viruses and malware the antivirus can detect. In addition, antivirus can also be affected by the ability of computer system resources. Some antivirus programs can eat up a lot of system resources, which can slow down system performance. Therefore, it is important to choose an antivirus that has settings and features that can be customized to suit the needs of the computer system. Although antivirus can provide effective protection against virus and malware attacks, no antivirus program is completely perfect. Some viruses or malware may be able to escape antivirus detection, especially if the virus has not been recognized by the virus database used by the antivirus. In addition, viruses and malware may continue to evolve and develop n techniques to evade antivirus detection. Therefore, the use of antivirus is only one aspect of necessary computer system security. It's also important to update your operating system and other application regularly, and to use strong passwords that aren't easy to guess. Avoid downloading suspicious files and limiting internet access to trusted sites can also help reduce the risk of virus or malware attacks. In conclusion, an antivirus is an important program that can help protect a computer system from virus and malware attacks. Antivirus works by scanning a computer system for signs of viruses or malware, and providing the option to delete or move infected files to quarantine.