The six characteristics of computer viruses are: 1. Parasitism; computer viruses are parasitic in other programs. When this program is executed, the virus will cause damage. 2. Destructive. 3. Infectiousness. 4. Latent nature; some viruses are like time bombs, with the timing of their attack being pre-designed. 5. Concealment. 6. Enforceability.
The operating environment of this tutorial: Windows 7 system, Dell G3 computer.
Computer virus (Computer Virus) is a set of computer instructions or program codes that the programmer inserts into a computer program to destroy computer functions or data. It can affect the use of the computer and can replicate itself.
Computer viruses are artificially created, destructive, contagious and latent programs that damage computer information or systems. It does not exist independently, but is hidden in other executable programs. When a computer is infected with a virus, it may affect the running speed of the machine at first, or crash and damage the system at worst. Therefore, the virus brings great losses to the user. Under normal circumstances, we call this destructive program a computer virus.
Six characteristics of computer viruses
1. Parasitism:
Computer viruses have parasitic characteristics. Computer viruses need to be parasitic in the host to survive, in order to better perform their functions and destroy the normal functions of the host. Usually, computer viruses are parasitic in other normal programs or data, and then use certain media to spread. During the actual operation of the host computer, once certain setting conditions are reached, the computer virus will be activated. When the program is started, the computer virus will continuously assist and modify the host computer files so that its destructive effect can be exerted.
2. Destructiveness:
After computer poisoning, normal programs may not be able to run, and files in the computer may be deleted or damaged to varying degrees. Destroy the boot sector and BIOS, and damage the hardware environment.
3. Infectiousness:
Computer virus infectivity means that computer viruses infect other non-toxic objects by modifying other programs to infect their own copies or variants. It can be a program or a component in the system.
4. Latent nature:
Some viruses are like time bombs, and their timing is pre-designed. For example, the Black Friday virus cannot be detected until the scheduled time. When the conditions are right, it explodes and damages the system.
5. Concealment:
Computer viruses are highly concealed and can be detected in small numbers through virus software. Covert computer viruses appear and disappear from time to time and are constantly changing. This type of virus must be dealt with It was very difficult to get up.
6. Executability
Computer virus, like other legal programs, is an executable program, but it is not a complete program, but is parasitic on other executable programs, so It enjoys all the powers available to the process.
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