In this article, we will study how virus disturb computer system. Various virus disturb computer system and a lot more about them. We shall also study:
- type of virus programs affecting the computer
- malwares and
- other programs that harm computer, Trojans.
Only Virus disturb computer system?
Have you ever wondered that each and every time your computer system is affected by some external sources; the causal program is not essentially a virus. However, it is true in maximum cases. It is the work done by the virus. But not always the case is the same. Here are some of the causes for the disturbances in the computer systems. As you go through the article, you will also observe the different types of viruses. Also the other ailing elements for your computer system.
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Various virus disturb computer system:
There are lot to say. But, I have listed here only some of the important one. These virus disturb computer system:
This type of virus is a permanent one which dwells in the RAM memory. From there it can interrupt all the operations. It can corrupt files and programs that are opened, closed, copied, renamed, etc.
Examples include: Randex, CMJ, Meve, and MrKlunky.
Direct action virus
It replicates and infects files in the directory or folder that it is in. And also in the directories that are specified in the AUTOEXE.BAT file path. This virus attacks when the computer is booted.
such virus delete the information contained in the infected files it infects. Thus rendering them partially or totally useless. It can only be cleaned by deleting the file completely, and thus losing the original content totally.
Examples of this virus include: Way, Trj.Reboot, Trivial.88.D.
it attacks the boot sector of the hard disk which is a crucial part of a disk. Here the information is stored together with the codes that make it possible to boot computer system from the disk.
Examples of boot viruses include: Polyboot.B, AntiEXE.
these types of virus infect the files that are created by using certain applications of program that contain macros.
These mini-programs make it possible to automate repetitive actions. Examples of macro viruses: Relax, Bablas.
it changes the paths that indicate the location of a file by executing a program. That program has been infected by the virus program. While the original file and program have been previously moved by the virus. Once infected, it becomes impossible to locate the original files.
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this type of virus encrypt or encode itself in a different way every time they infect a system. This makes it impossible for the anti-virus programs to find them. Besides enabling them to create a large number of copies of themselves.
Examples include: Elkern, Satan Bug, and Tuareg.
this type of virus infects programs or executable files. Executable files have .exe as extension. When one of these programs is run, directly or indirectly, the virus is activated. It then produce the damaging effects it is programmed to carry out. The majority of existing virus belong to this category, and can be classified depending on the actions that they carry out.
the file allocation table or FAT is the part of the disk used to connect information. It is a vital part of the normal functioning of the computer. Such dangerous virus prevent access to certain sections of the disk where important files are stored. Damage caused can result in information loses from individual files or even entire directories.
Programs other than virus disturb computer system
As I have already stated that not every time the disturbing factor is a virus. Many-a-times, they are different than virus. Here are some other programs other than virus disturb computer system:
Similar to a virus, it has the ability to self-replicate, and produce negative effects on a system. But they are detected and eliminated by antiviruses.
Examples include: PSWBugbear.B, Mapson.
Trojans or Trojan Horses
trojans unlike viruses do not reproduce by infecting other files, nor do they self-replicate.
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they are not viruses as they do not replicate. They are not even programs in their own right. They are rather camouflaged segments of other programs. Their aim is to destroy the data on the computer once certain logical conditions have been met.
Your turn on virus disturb computer system
Here we dealt with “virus disturb computer system”. The original list of potentially harmful programs is larger. Also, there are many more which do not satisfy a particular definition. It is because they work like they belong to two, three or even more of these classes. However, their aim is always the same. Let me know what you learned and what I missed in this article.