What is antivirus,widely used antiviruses,how to scan a pc and reviews of antivirus

What is a antivirus program:

Antivirus software is a computer program that detects,prevents and takes action to deactivate or remove malicious programs (Viruses,worms,adwares etc).
Antivirus program runs in background all the time and informs the user when some malware is detected.

Antivirus software protect computer connected to the network computers.
Some examples of antivirus software are:

• Symantec Antivirus software
• McAfee Antivirus software
• AVG Antivirus
• Kaspersky
• BitDefender
• Nod32

Widely Used Antivirus Software:

Everyday new viruses are spreading and infecting millions of computer across the world.For all computer users it is very important to have proper antivirus program installed in their  computers to secure the data and programs.

Following are some widely used antivirus programs.