What are the forms of computer virus damage?

Normally, what computer viruses cannot damage is [hardware and external devices]. Printers should be selected in the question.

That is, external devices such as host displays, keyboards, printers, mice, etc. Computer viruses destroy only data, systems.

Harm. It is very important to enhance the awareness of computer virus prevention and realize the destructive and destructive nature of viruses. Nowadays, computers have been used in all walks of life, computers and computer networks have become an important part of people's lives, and viruses will destroy and tamper with computer data, theft will cause serious network security problems, affect the use of network efficiency.

1) If a virus is triggered, the computer will react very much; Most viruses directly destroy the important information and data of the computer when they are fired, it will directly destroy the CMOS settings or delete important files, it will format the disk or rewrite the directory area, and it will rewrite the files with "junk" data. Computer virus is a period of computer **, must occupy the memory space of the computer, some large viruses are still self-replicating inside the computer, resulting in a substantial reduction in computer memory, the virus also preempts the interruption, modifies the interrupt address and adds the "private goods" of the virus in the process of interruption, which interferes with the normal operation of the system. After the virus invades the system, it will automatically collect important data of users, steal and leak information and data, resulting in a large amount of user information leakage, bringing immeasurable losses and serious consequences to users.

2) Consumes memory as well as disk space. For example, if you don't access the disk, but the disk indicator flashes wildly, or you don't actually run many programs but find that the system has taken up a lot of memory, it is possible that a virus is at work. Many viruses are in memory when they are active, and some file-based viruses can infect a large number of files in a short period of time, and each file is lengthened to varying degrees, resulting in a serious waste of disk space. Normal software often needs to be tested by many people to improve, and computer viruses are generally released by others after the completion of a computer, so the harm that viruses bring to computers is not only the viruses expected by the manufacturer, but also some due to computer virus errors.

3) Computer viruses cause serious psychological pressure to users, the flood of viruses makes users worry, always worried about being infected by viruses, because most people do not know much about viruses, once there are phenomena such as computer crashes, abnormal software operation, etc., people often suspect that these phenomena may be caused by computer viruses. According to statistics, it is a common phenomenon for computer users to suspect that "there is a virus in the computer", and more than 70% of computer users are worried that their computer has invaded the virus, but in fact, all kinds of phenomena that occur in the computer are not all caused by viruses.

Brand model: RedmiBookPro15

System: Windows 7

Software version: Computer viruses mainly cause damage to the disk and the programs and data in it. A computer virus is a set of computer instructions or programs inserted by the compiler into a computer program that destroys computer functions or data, can affect the use of the computer, and can replicate itself.

A computer virus is a program that is artificially created, destructive, contagious, and latent in that can destruct computer information or systems. It does not stand on its own, but is hidden within other executable programs.

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Computer viruses mainly damage memory, files, operating systems, hard disks, and system data areas.

1. Destroy memory.

There are four main ways to destroy the memory of your computer: occupying a lot of your computer's memory, prohibiting the allocation of memory, modifying the memory capacity, and consuming memory. Viruses occupy a lot of memory and consume a lot of memory resources when running, resulting in a lack of system resources, which in turn leads to crashes.

2. Destroy files.

Viruses can destroy files in the following ways: renaming, deleting, replacing content, reversing or copying content, missing part of the program**, writing time gap, splitting or counterfeiting files, losing file clusters, and losing data files. Files that have been damaged by viruses will not be usable if they are not disinfected in time.

3. The slag ruler destroys the operating system.

Computer viruses can also disrupt the normal operation of the operating system, including automatic restart of the computer, crash for no reason, failure to execute commands, interference with the execution of internal commands, failure to open files, false alarms, occupation of special data areas, forced startup of software, and disruption of various output and exit entrances.

4. Destroy the hard disk.

The main manifestations of computer virus attacks include destroying the data stored in the hard disk, not reading and writing the disk, swapping operations and incomplete writing of the disk.

5. Destroy the system data area.

Since a large number of files and important data are stored in the data area of a hard drive, the destruction of them by computer viruses can often have devastating consequences. The main attack of the virus is the main boot sector, boot sector, FAT table and file directory of the hard disk, when these locations are damaged by the virus, the data can only be restored through professional data recovery.

A computer virus is a kind of man-made malicious program, the main thing is to destroy the program and data of the computer, and it can also cause the destruction of hardware.

Destruction of computer data: After the computer virus is activated, it will destroy the stored data of the computer by formatting, rewriting, deleting, destroying the settings, etc. Stealing users' private information (e.g., bank passwords, account passwords), stealing users' property, or using users' computers controlled by viruses to carry out illegal acts.

Occupy computer space and preempt memory resources: Computer viruses can self-replicate and spread to occupy disk sectors. At the same time, it will occupy memory space, affect the running speed of the computer, affect the normal system operation and software use, and cause the system to run unstable or paralyzed.

Destruction of computer hardware (e.g., motherboards).

The main symptoms of computer poisoning

The work will be very abnormal; Inexplicable crashes; abrupt reboot or failure to start; The program does not run; The number of bad disk clusters has increased inexplicably; Disk space becomes smaller; The system starts up slowly; loss of data and programs; Abnormal sounds, ** or some meaningless screen greetings and other displays; Abnormal use of normal peripherals, such as printing problems, inconsistent characters entered on the keyboard and the screen display, etc.; The exception asks the user to enter a password.