Computer Virus Definition
Computer virus is a computer program that duplicate or reproduce themselves with a copy or paste a copy of itself into the media / document and in the network to secretly without the user's computer. The effects of computer viruses varies from only the messages appear strange to damage the computer and delete files or documents we.
Types of Computer Viruses
a. Worm
Worm is a security hole or slit our weakness on the computer that allows our computer infected with the virus without having to execute a file that usually occur on the network.
b. Trojan
Trojan is a program that allows our computer controlled the other through the network or the Internet.
c. Spyware
Spyware is an application that let the data or information practices of users in using the computer to outside parties without we realize. Usually used by the advertiser.
If we see the gaffe on storage media such as a file called strange that we never created the file or not the type of application / application as a claim to the application but then we do not click, we are open or we run the computer so that the virus is not transmitted to the computer that we use.
The signs of Computer Virus infected Computers:
- Computer running slow from normal
- Frequently eror message out or exotic
- Changes the appearance of the computer
- Storage media such as floppy disks, flash, and so copying the file directly without our coffee strange when we connect to the computer.
- Computers like restart or crash when running.
- Like any posts or messages appear strange
- Computer stops responding, or hang us.
- Harddisk can not be accessed
- Printer and other devices can not be used even though there is no hardware problems and software drivers.
- Often, there is the menu or dialog box that error or damage.
- The loss of some basic computer functions.
- Computers trying connect themselves with the Internet or a network without our order.
- Files that we store on computers or storage media that are lost or hidden viruses. and others ...
Distribution of media via computer virus
- Storage Media (diskettes, flash, external hard drive, zipdisk, cd, dvd, bluray disc, cartridge, and so forth)
- Network lan, wan, man, and so forth.
- File attachment or file attachments in email messages or other electronic.
- File software (software) that carriaged computer virus.
The most powerful way that we are not exposed to the virus is a computer with a computer program that installs the original or not original is not pirated ditunggangi virus and his friends, does not connect with a computer network or the internet, and never to open or execute files from the originating computer other.
But I like it too extreme and less gaul in the use of the computer everyday because we usually do the exchange of data or files with other computers such as work files, image files, file attachments, music files, video files, and so forth.
Antivirus program is able to detect the virus and prevent access to the infected document and is also able to eliminate the infection occurred. Virus scanner program is a type of the most popular in the antivirus world, but programs like this should be updated frequently to be able to recognize a new virus-the virus. In general there are two types of antivirus programs, the on-access and on-demand scanner. Many peerusahaan that offers a combination of two types of programs in one package.
On-access scanner is always active in the computer system for your use. This type of scan will automatically check the documents that you access and can prevent you from using the documents that have been infected by computer viruses.
On-demand scanner that will let you start scanning the activity of all documents on your computer. This can also be set so that you can be done periodically using the scheduler.
There is also the type of anti-virus scanning to implement the heuristic. This allows the scanner detects the virus, either already known or not, using the rules of a general indicator of the existence of a virus. This is very useful to detect virus-virus or a new type has not been detected previously. This type of heuristic scanner need not be updated often, but sometimes side effects can cause the error detection, which should be the normal program or document, but detected and considered as a virus.
if anti virus is gun, update the virus definitions are a bullet. No update virus definitions, antivirus will penetration, because they were not able to recognize new variants of virus.
