Even until now that our surroundings are so much occupied with technology, there are still many people do not understand what is actually a computer virus. Therefore, this article is written to let you have a better understanding of the term – computer virus.

What is a computer virus?

A computer virus is a computer program that can infect your computer system by executing itself without your permission or knowledge and run against your wishes. Viruses can also replicate itself to maximize the infection.

What is a computer program?

A computer program is a list of instruction for a computer to execute.

Basically, people create computer programs to do good things such as music player, video player, email programs, calculator and many more. They are all helpful program which bring benefits to the people.

Unfortunately, some people write programs to do bad things such as programs that might corrupt or delete your files or documents on your hard drive or programs that might send your private data(ex. credit card number) to strangers or to the writer himself. This kind of program is known as computer virus.

Why we call it a VIRUS?

Well, it’s just like a human virus, it can be very dangerous and destructive. It can also spread itself from one computer to another by many ways. For instance, viruses are most easily spread by attachments in e-mail messages or instant messaging messages over the network or the internet. Viruses are also easily spread by carrying it on a removable medium such as floppy disk, USB drive or CD.

What is the difference between viruses, worms and Trojan horses?

Some people distinguish between general viruses, worms and Trojan horses. A worm is a special type of malware programs that can replicate itself and use memory, but cannot attach itself to other programs, and a Trojan horse is a file that appears harmless until executed.

Here are some tips on how you can get rid of virus infections from daily activities:

• The most important action you should have taken is, of course, to install an anti-virus program. This is important as to ensure everything coming in and out of your computer is clean and safe.
• When you have to insert any removable device such as usb drive, CDs, floppy disk (too old to mention), you must not run anything from it before you do a full scan for the device.
• Surf the internet properly. Do not attempt to download and run anything from a website you do not know whether it is trustworthy. It’s always recommended to install anti-virus that comes with internet security.
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