A computer virus is a computer program that can replicate itself and spread from one computer to another. The term "virus" is also commonly, but erroneously used, to refer to other types of malware, including but not limited to adware and spyware programs that do not have a reproductive ability. Viruses can increase their chances of spreading to other computers by infecting files on a network file system or a file system that is accessed by other computers. Anti-virus software is used to prevent, detect, and remove malware, including but not limited to computer viruses, computer worms, Trojan horses, spyware and adware. Computer security, including protection from social engineering techniques, is commonly offered in products and services of antivirus software companies.

An anti-virus program protects a computer from getting malicious viruses from the internet, through websites, , and instant messenger. Usually it consists of a firewall, a virus scanner and remover, and sometimes other tools as well. Anti-virus software offers computers and the network they are connected with protection against a type of malware called viruses. Antivirus software can be used to prevent an infection or by find and removing an infection. To prevent an infection software usually uses a firewall. The best firewall is a 2 way firewall. A two way firewall grants or denys internet access to programs already installed on your computer. It also denies or grants access to other computers trying to access your computer. Removing infections is important because it stops annoying pop ups, irregular behavoir, system faliure and more.

1.Head over to the Microsoft Security Essentials page and download the software. Double-click on the installer to begin the installation process. 2.The installation should be pretty self-explanatory. Follow the steps it gives you. Make sure you have checked the box to turn on the Windows Firewall when prompted, and give the whole thing a few minutes to install. 3.When it's done, it will ask you to run a scan. click yes, and it will download the latest virus definitions and run its first scan. All of this will take a few minutes, so just leave the program alone and let it do its thing. 4.When it's finished it's scan, it will begin monitoring your computer. Click the "Change My Scan Schedule" button to schedule a regular scan of your computer.

1.Download program. 2.Set program to automatically update every day. 3. Add the scanner to scan your as it comes into your mail program. 4. Right click on any program or file on your computer to run a specific anti-virus check on it to find that does it have virus. 5.Check anti-virus every day for protection of virus.

We choose this program because it help computer from virus, to destroy virus and it help to prevent a virus in another materials to go come in computers so if you don’t have this program your computer will catch the virus easily.

The advantage of having anti-virus software is that it keeps Viruses off your computer. There are several types of viruses such as Spyware, Adware, Trojans, Malware, and Worms. It helps to clamp down on viruses entering your system. Viruses are dangerous software that can be planted on your pc without you knowing. They can damage your personal and system files and causes badness to happen for your computer.

Whether it's a home desktop computer, college laptop or that terminal at your office, the use of a PC is part of life today. Unfortunately, so are computer viruses. As "UK Cheap Broadband" magazine advises, even if you don't download anything from the Internet, don't think you're safe from viruses or spyware. The latest viruses are designed to travel from one computer to another across the Internet, on their own. Having antivirus software is therefore a must, but you should know their possible disadvantages before settling on one. Some disadvantage of Antivirus are given below: 1. It makes computer slow. 2. It is costly. 3. It cannot detect or remove all viruses.

VIDE O This video show that stick man is a virus and has a anti-virus to lock up this virus.

Anti-virus program is program that protect your computer from virus by find and delete the virus from your computer. Now every computer have an anti-virus to protect computer. If computer not have this program virus from anywhere will come easily and destroy a computer easily so your computer will have a low service life and some virus is very dangerous so if your computer don’t have antivirus program you have to install it now because it will protect your computer.