Types of computer viruses.

If comparisons can be seen that a computer virus with human virus. The symptoms are very similar, but almost say that this virus is designed to be identical to the human virus.

Several types of computer viruses.

Computer viruses are divided into five categories.

1. Boot sector viruses. Boot sector viruses, or in fact (the boot sector virus / boot infectious virus) are viruses that hide in the boot sector (the hard disk is read before the others) with this virus is not hidden in the floppy disk. In reading data from a floppy disk. The virus is lurking in the boot sector of your hard disk. For our hard drive is infected. The virus interferes with the computer when you restart.

2. Virus program or file to effects of the virus (virus program / file infector viruses) is a type of virus that is related to the program. This is normal. The exe file extension is. Com,. Dll o. And some viruses can enter. To be in a program that has the extension. Sys. Bin. Drv, and programs with the programs overlap. Overlay program is usually a file from OV to the virus than once. In the program, there are two ways to enter the program, the result is that after a program is already infected. The wider dimension of the program. Or a copy of itself to replace the existing program so that the program will not change and difficult. To repair the original again.

The virus is typically called when an infected program. The virus will run and take the opportunity to take root in the immediate memory, and then provide the program will continue to operate normally. When the virus is embedded in the memory. After that, if we talk about other programs. To continue working. The virus would copy in these programs immediately. The next pandemic. Another is to spread. Once the program has a virus. The virus in other programs on the disc to copy itself in an instant and then allow the program to run. Continue to function normally.

3. Poly viruses motorized traffic (polymorphic viruses) is in contact with the virus has the ability to change themselves into. When there is a copy (copy) to happen. This can range up to several hundreds of types of these viruses is to make it more difficult to detect. The antivirus scanner used to scan a new virus nowadays that have this capability has increased the amount of time.

4. Macro viruses (macro viruses) is a virus that can lurk in the prototype (model) to create documents. The master file is infected. All documents to be connected to the master file that is infected by a corrupted file.

5. Stephanie Blythe virus (Stealth Virus) is a virus that has the ability to detect stealth effects, such as files in the industry. Virus to infect any program that will make the size bigger program. If a virus is a virus, Stephanie Blythe. Unable to determine the actual size. The increase because the virus is to control when the DIR command, or use any program to check the size of the program. The program will display the same. Everything as if nothing had happened.