ANTI VIRUS SOFTWARES

Anti-virus softwares are the chunks of code which sneak around our PCs and protect it from malicious softwares or programs.
Viruses in the form of worms, trojan horses, spyware, adware, etc. roam the whole internet. They are created by people who intend to either harm other peoples computers or to spy them and gather valuable information others' surfing habits. They do this either for monetory gains or just for fun! The viruses are malicious programs which enter into uor PCs secretly and perform operations which can severely harm our PCs. Therefore we as internet users must be capable of protecting our computers against these malicious programs. This is where anti-virus softwares come to our rescue.
Anti-virus softwares keep a constant vigil around all the processes running in a computer. It forms guard-posts at all the ports of the computer and checks all the data flowing into or outside the computer. If it finds any malicious program being executed or any suspicious data being transferred, it alerts the user of the happenings and prompts for proper action. Mostly it is preset that the antivirus software deletes or quarantines any such data. It is very difficult to do all this manually. By using an antivirus software, it is all taken care of by the software itself.
These softwares have collection of signatures of virii which are currently roaming the internet. While performing a virus-scan the software compares all the files in a computer with these virus-signatures. Any file found with matching properties is consitered to be a virus program and is then suitably treated. The virus-signatures should be regularly updated from the anti-virus company's database. This keeps us protected against any potential threats which are released on the internet daily.
We must use good anti-virus software to protect our PCs. Many are available in the market, with varying capabilities and fortifications. I have come across a few good ones like Avast, AVG, QuickHeal, McAffe. But the most satisfactory performance which I have experienced is with the Kaspersky Internet Security software, published by Kaspersky Labs. It has a very clean interface and various scan options. A trial version can be downloaded for free from the company's website. Kaspersky Labs also provide an online scanner service for free. The company has a very updated database of virus signatures and virus-signatures are updated as frequently as every hour, when set to automatic mode.
To wrap-up, I recommend everybody to use a good antivirus software to protect the valuable memories of your loved ones and any classified information in your computers and keep away those burglars and sneakers roaming the internet.