Noralabs Norascan 4-0

Editor's choice Noralabs Norascan-4

Noralabs Norascan helps to scan various issues on your PC, including viruses, rootkits, and much more. It is a standalone program and makes sure that you can find spyware easily on your computer. ...

GridinSoft Anti-Malware 4.2.40

Editor's choice GridinSoft Anti-Malware-7

GridinSoft Anti-Malware is a program created by GridinSoft. The main purpose of this software is to remove almost all the viruses from your system. So, if you want to check your PC for malware and ...

Spybot – Search & Destroy

Editor's choice Spybot Search and Destroy-07

Spybot- Search and Destroy is a spyware and adware removal tool by Safer-Networking Ltd. The program got its first stable release in 2018 and has been online since then with regular updates to boost ...

Crystal Security

Editor's choice Crystal Security

If you deal with a lot of downloads then you know how important security for your system can be and that is what Crystal Security specializes in as software. It makes sure that your data is safe from ...

ESET NOD32 Antivirus

Editor's choice ESET NOD32 Antivirus-14

ESET NOD32 Antivirus is a downloadable program that guards your computer against malware threats. It was created by the Slovak company ESET. A characteristic feature of this program is a fast ...

Kaspersky Anti-Virus

Kaspersky Free

Kaspersky Anti-Virus is a downloadable antivirus from Kaspersky Lab, the company which specializes in creating software that protects our computers. Currently, we are increasingly more exposed to ...

AVG AntiVirus 2022 22.6.3242

Editor's choice AVG AntiVirus FREE 2016-digital-boxshot-download

From AVG Technologies comes their very reputable AVG Antivirus FREE.  The program has since its beginning become one of the most trusted computer security sources, with hundreds of millions of ...

Panda Free Antivirus 2020

Panda Free Antivirus

Panda Free Antivirus has been developed by Panda Security, a Spanish-based international IT company dedicated to providing cyber security solutions to their clients. The company has come up with ...

An anti-virus program (or anti-virus) is a computer program which purpose and main task are to protect your computer against viruses by detecting and removing them. Currently, such programs can be found in suites with other complementary applications.

How do Anti-viruses Work?

In most cases, these programs consist of two modules. These are:

A scanner which purpose is to examine files periodically or on a specific request. It examines the contents of the disk and also selects potentially dangerous files. Scanning is one of the oldest ways to get viruses. It works by searching for a specific unique sequence of bytes. Because of the development of the viruses, this module will not always cope with the newest threats, but it is an effective protection tool.

Monitor – a program which task is to constantly analyze files for threats. Its operation is based on monitoring any calls to the hard disk.

In addition to these two modules, there are also vaccines. These are special programs, designed for specific viruses, which are aimed at detecting malicious code and then eliminating it. The vaccines are an effective method only when it comes to the old type of viruses that are already known.

Additional components included in security suites, (besides the antivirus programs) are firewalls, intrusion detection and prevention modules, memory scanners, and MBR guards. Modern anti-viruses use cloud computing that allows for an accelerated response in case of any new threats coming up.