AskEssays.com - Discover essay samples

Computer virus

4.9 of 5.0 (148 reviews)

Contains
359 words
Category
Science

Computer virus Page 1
Computer virus Page 2
The above thumbnails are of reduced quality. To view the work in full quality, click download.

Computer virus


Computer Virus

It Is Contagious



"Traces of the Stealth_c Virus have been found in memory. Reboot to a clean system disk before continuing with this installation'" This was the message staring back at me from one of the computer monitors at my office. Questions raced through my mind. "Stealth_c?" "What's a system disk?" "How am I supposed to install anti-virus software if the computer system already has a virus?" As a discouraging feeling of helplessness came over me, I thought of all the people who had loaded something from disk on this box or who had used this box to access the Internet. Because there was no virus protection in the first place, it was going to be very difficult to determine how many floppy disks and hard drives had been infected. I wished I had learned about computer viruses a long time ago. What is a computer virus, anyway? Is it a computer with a cold? A computer "virus" is called a virus because of three distinct similarities to a biological virus. They are: ? They must have the ability to make copies of, or replicate, itself. ? They must have a need for a "host," or functional program to which it can attach. ? The virus must do some kind of harm to the computer system or at least cause some kind of unexpected or unwanted behaviour. Sometimes computer viruses just eat up memory or display annoying messages, but the more dangerous ones can destroy data, give false information, or completely freeze up a computer. The Stealth_c virus is a boot sector virus, meaning that it resides in the boot sectors of a computer disk and loads into memory with the normal boot-up programs. The "stealth" in the name comes from the capability of this virus to possibly hide from anti-virus software. Virtually any media that can carry computer data can carry a virus. Computer viruses are usually spread by

data diskettes, but can be downloaded from the Internet, private bulletin boards, or over a local area network. This makes it extremely easy for ...

You are currently seeing 50% of this paper.

You're seeing 359 words of 718.

Keywords: computer virus definition, computer virus in the philippines, computer virus names, computer virus protection, computer virus kya hai, computer virus images, computer virus examples, computer virus download

Similar essays


Dinosaurs 2

Just as most dinosaurs are believed to be wild and mean, most are. Unlike the wild and ferocious Tyrannosaurus Rex, the Velociraptor, is a smaller, agile dinosaur. The Brontosaurus can be found with the bigger, more gentle dinosaurs. The Tyrannosaurus Rex, Velociraptor, and Brontosaurus differ greatly in their body structure, diet, and discov...

8 reviews
Download
Hereditary colon cancer

Hereditary Colon Cancer Colon cancer is one of many cancers to plague United States citizens. There are four known types of colon cancer. Fourteen percent of all cancers diagnosed are colon cancer. Colon cancer is the third most commonly diagnosed cancer. Sporadic cancer accounts for 80 percent of all colon cancers and is considered non...

207 reviews
Download
Bioremediation of explosives in contaminated soil

Bioremediation of Explosives in Contaminated Soil Abstract TNT is not the kind of substance that most people think of composting, but it can be done! At several U.S. Army depots, the water used in processing explosives was disposed of through evaporation from unlined lagoons. This has resulted in sediments and soils that are contamina...

84 reviews
Download
Digital vs Analog Cellular

Digital vs. Analog Cellular When purchasing a cellular phone there is always the question of analog or digital. In analog cellular service the voice is transmitted over a specific radio frequency, usually 800 MHz. Digital cellular service on the other hand breaks the voice down into a binary format where the voice is represented b...

62 reviews
Download
Arthritis, the hidden dissability

Introduction There are more than 115 different types of arthritis. Some are very serious and hold the potential for severe disability and deformity, if left untreated. Others may generate only mild discomfort, which may be totally controlled with relative ease. Myths and misconceptions thrive everywhere. Despite the continued efforts...

135 reviews
Download
Melatonin

It seems as though every time we turn around there is a new health fad, be it a drug, herb or diet. Within the past 10 years the drug melatonin has hit the market and seems to have made quite a splash with the public and the media. At a time when an estimated thirty to forty million Americans suffer from serious sleep disorders t...

53 reviews
Download
Global warming

-. GLOBAL WARMING In 1992 the United States and nations from around the world met at the United Nations Earth Summit in Rio and agreed to voluntarily reduce greenhouse gas emissions to 1990 levels by the year 2000. The Rio Treaty was not legally binding and, because reducing emissions would likely cause great economic damage, many nations wil...

40 reviews
Download
Internet 2

There has been a great deal of excitement in the media over the significant commercial potential of the internet. Many commercial enterprises are viewing the internet as a significant element of their business operations. They see it as a means of advertising, selling and supporting their product globally.However, there are certain critical are...

16 reviews
Download
Deep ocean trenches

Deep Ocean Trench A trench is any long, narrow, steep-sided depression in the ocean bottom. The deepest known depression of this kind is the Mariana Trench, which lies east of the Mariana Islands in the western North Pacific Ocean . Of the Earth's 20 major trenches, 17 are found in the Pacific. The only Atlantic trenches are the Puerto Rico...

160 reviews
Download
Global warming 3

-- Global warming (After a lot of reading and hunting around on the net, I found a great deal of information on this topic. I had never really researched on it before so wanted to make sure that calculations agreed from report to report. Most of them did so I will base my answer on these different reports. This subject is extremely intere...

153 reviews
Download
Lighting advancments

Have you wondered why streetlights are yellow, or why the year 2000 cars have brighter headlights and they are a different color? Have you ever wondered how the indiglo light on your watch works, or why it glows green and not white? And did you know that same indiglo light can be used while frozen, dipped in water, bent in half, stepped on, or...

84 reviews
Download
Membrane Physiology

Introduction The cell membrane is a fluid structure that is made up of phospholipids and proteins. Its main function is to allow osmosis and diffusion to occur in a cell. It protects a cell from taking in molecules that are too large and other chemicals that are not permeable without energy being used. The cell membrane is co...

101 reviews
Download
Chemistry investigation

Investigate A Factor Which Affects the Rate Of Fermentation Of Yeast This experiment is investigating one of the factors which affects the rate of fermentation of yeast. Several factors affect the rate of reaction: _ Increasing the concentration. (See the lock and key theory.) If the substrate (glucose) is increased, the...

66 reviews
Download
Cloning 6

Millions of people. They all look alike, think alike, and dress alike. Sounds like something out of a sci-fi novel, right? Well, with cloning it's possible, maybe. They will look alike, but that's about it. Cloning will help the world, not make it the same. Three pros to cloning are that cloning may hold the secret to eternal youth, the r...

67 reviews
Download
Atsisiųsti šį darbą