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Malware, as you know is a class of malicious software such as spyware, adware, or viruses that compromise with the system's performance and security. And in majority of cases they infiltrate through general Internet activities --- browsing, surfing, and downloading, or executing programs or files. Hence, most of the virus or malware defense methods are based on encouraging secure Internet access. Though, virus or malware authors are using astute development techniques, keeping a keen eye on the behavior of your machine, can be helpful in winning the battle of computer security. Following are a few notable symptoms, which can be perceived as an indication of virus or malware attack:

"Because March 6th 1992 was day zero for the Great Michelangelo Virus Scare, the first and probably one of the biggest computer virus scares that the world has ever seen."

A PC Pro reader was left startled after a customer support company rang his grandfather to tell him there was a virus on his PC, and then tried to charge him £185 to remove it.

Sometimes being unaware of the USB virus-or malware-infection, you may put your computer security at stake. The AutoPlay feature of the Windows, executes the file or program stored on your device, without asking for permission, and that may bring havoc on the operating system as well as the confidential data stored on the machine. Thus, you need to disable the AutoPlay feature to deter such security breaching.

I've included every type of computer virus in this article that I felt was relevant, but this isn't a list of every type of virus known to man. Also, I did not include any worms or trojans, two common threats that are similar to viruses but technically not the same. If there is a specific type of virus that you feel was missed and is important, let us know in the comments.

Microsoft has added a wonderful Windows repair tool to find a quick way out of Windows problems. This is actually a reverse gear, which you can use to alter any changes that might have incurred to the operating system due to faulty software or driver update, virus or malware attack, incompatible driver, or more. So don't forget to create Restore Point within a reasonable timeframe-say, the last couple of months to stay safe.

Is your computer infected with a virus that is preventing you from downloading security updates from the Internet or from running any antivirus program on that machine? Or are your looking for an antivirus software that can be carried on a USB drive to quickly scan any disconnected computer(s) for viruses or malware?

Advantages: Keeps system running smooth Protection against Internet frauds

It's in your airports, your coffee shops and your libraries: "Free Public WiFi." Despite its enticing name, the network, available in thousands of locations across the United States, does not actually provide access to the Internet. But like a virus, it has spread - and may even be lurking on your computer right now.

This video explains the how computer viruses, worms and trojans work and what you can do to protect yourself.

An infographic dissecting the nature and ramifications of Stuxnet, the first weapon made entirely out of code. This was produced for Australian TV program HungryBeast on Australia's ABC1

Firewall is an important part of computer security. And, you often get people selling you a new one. Windows always come with its solid firewall. This tutorial contains the answers of some important questions related to firewall security.

Despite updated operating system, browser, browser add-ons, installed firewall, and acute computer security settings, clever viruses, spyware or Trojans may find loop-holes to slip into your system. Not only in terms of performance, but in terms of stability and security too, these malicious software push you on back-foot. What to do next?

Spyware usually refers to software that is created with the sole purpose of taking partial or complete control of a person's computer without the permission of the owner of the computer. What spyware does is that it uses the resources in your computer to report certain information to someone else that you do not know. Simply put spyware spies on you and on your computer.

Now, Mac is the next target of hackers. Till now, Mac operating system was untouched by hackers and Mac users were accessing web freely.

In case, you are getting a phone call regarding your PC infection then no need to respond. This is not a help from technical vendor but a scam.

Iran's nuclear agency is trying to combat a complex computer worm that has affected industrial sites throughout the country and is capable of taking over power plants, Iranian media reports said.