There is a type of computer program that is designed and written to destroy, alter or damage data stored on computers without your knowledge or permission. These are some of the problems that these programs cause

? Your computer displays annoying messages

? Your computer develops strange visual and sound effects

? Files on your computer mysteriously disappear

? Your computer starts working very slowly

? Your computer reboots unexpectedly

These programs are typically referred to as viruses although technically the computing term virus actually refers to a specific type of pest program. Other types are called Trojan horses and worms. The difference between these pest programs is how they behave when attacking a computer system and I am going to look at each type individually to explain the difference startin

There are precautions that can be taken to protect and maintain data security. You can generally avoid a computer virus if you are just careful not to use files from high-risk areas such as off the Internet. If you do need to use a file from a high-risk source then you can use a virus detection program before you run it. A virus detection program will check for viruses and if necessary eliminate the problem. Other ways of protecting data is to make frequent backups so if a virus does destroy any data it can be replaced once the virus has been removed. And finally take basic steps to ensure that there is no unauthorised access. Unfortunately, even with all these precautions it is almost impossible to ensure complete data security but they will help to reduce the risk drastically of any unlikely occurrence.

A computer virus is a program that is designed to replicate and spread itself on its own, preferably without anybody knowing it exists. They spread by attaching themselves to other programs (such as your word process

Some common words found in the essay are:
Viruses Explain, Internet Worm, trojan horse, data security, type pest program, replicate spread, virus detection program, pest program, computer virus, called macro, files computer, program designed, viruses technically, detection program,
Approximate Word count = 690
Approximate Pages = 3 (250 words per page double spaced)