what is a computer virus?
A computer virus is a set of computer codes that overwrites, replaces or attaches itself to some part of a program or operating system in order to make a copy (or copies) of itself. It comes with instructions that set off some task(s) that affect the infected computer. These may range from the comparatively harmless to really destructive. Some viruses display text or pictures, but other than that, they are relatively harmless. Others, reduce memory space, modify existing data, or use up CPU processing time. But the destructive ones may overwrite or destory all your files or even crash your hard disk!
How does a computer get a virus?
A virus can be introduced to a computer in various ways. It can be attached to any file or programs that you copy from floppy disks, or download from the Internet. While many viruses today spread through email, and they are released not only by opening the attachment but also by simply opening the email itself.
The virus can be activated the minute it is installed on your computer; but in many cases, it can remain inactive until you run or execute the program that contains it. You will not usually be aware of the presence of the virus, and may innocently spread the virus to others.
An ounce of prevention
A virus can do its dirty work on your personal computer or your network; but there have been many cases that a particular virus wreaks havoc on the entire world, severely compromising many corporate businesses and government functions. Thus, it is important to take the necessary precautions before it is already too late.
As the world gets connected with today’s intricate cyber world, viruses spread faster than ever. So when you notice that your computer is acting a bit weird or erratic, you should immediately scan for a virus.
Friday, July 11, 2008
what is a computer virus?
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