Antivirus software is an application designed to detect and remove viruses, worms, malware applications and trojan horses from various computer systems. Antivirus software in certain cases can prevent adware and spyware programs.
Antivirus software detect viruses by checking for their signature in files or by using advanced heuristics to detect malicious code. Beside detection, antivirus software provide real time protection of infection.
It is good to know that even if you have antivirus software it is possible to get infected with new type of viruses for which one signatures don’t exist yet, also some antiviruses can easily degrade computer performance.
Before getting an antivirus best thing is to consult various security forums and sites for professional opinions.
Antivirus software can be free or paid software where paid ones are offering generally better protection. Licences for these programs are usually sold on month, six months, or a yearly subscription. Sometimes you can get it for free by being active on security forums or taking their regular contests such as:
http://scforum.info/index.php/topic,4136.0.html
Some of the world most known antivirus softwares are: NOD32, Bit Defender, Panda Antivirus, McAffee, Avira, Trend Micro, Kaspersky, Norton Antivirus , Avast, F-Secure and many others…




