Computer viruses mainly cause "destruction of programs and data." As long as any virus invades the system, it will have varying degrees of impact on the system and applications. In mild cases, it will reduce computer work efficiency and occupy system resources. In severe cases, it can cause data loss and system crash.
The operating environment of this tutorial: Windows 10 system, Dell G3 computer.
Computer viruses mainly cause "destruction of programs and data."
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 best, or crash and damage the system at worst.
As long as any virus invades the system, it will have varying degrees of impact on the system and applications. In mild cases, it will reduce computer work efficiency and occupy system resources. In severe cases, it can cause data loss and system crash.
When a virus invades a computer, it is often extremely destructive and can destroy data and information, and even cause large-scale computer paralysis, causing great losses to computer users. Computer viruses such as common Trojans and worms can invade computers on a large scale and bring security risks to computers.
Hazards
Nowadays, computers have been used in all walks of life, and computers and computer networks have become an important part of people’s lives. Partly, viruses will destroy and tamper with computer data, and theft will cause serious network security problems and affect the efficiency of the network.
(1) If a virus is activated, the computer will have a great reaction; most viruses will directly destroy the computer’s important information and data when activated. It will directly destroy the CMOS settings or delete important files and format them. Freezing the disk or rewriting the directory area will overwrite files with "junk" data. A computer virus is a piece of computer code that definitely occupies the computer's memory space. Some large viruses also replicate themselves inside the computer, causing a significant reduction in computer memory. When the virus is running, it also preempts interrupts, modifies the interrupt address, and adds virus information during the interrupt process. "Private goods" interfere with the normal operation of the system. After the virus invades the system, it will automatically collect important user data, steal and leak information and data, causing a large amount of user information to be leaked, causing immeasurable losses and serious consequences to users.
(2) Consume memory and disk space. For example, if you are not accessing the disk, but the disk indicator light is flashing wildly, or you find that the system has occupied a lot of memory when you are not actually running many programs, this may be a virus; many viruses are causing the problem. They are all resident in memory when active. Some file-type viruses can infect a large number of files in a short period of time, and each file is lengthened to varying degrees, causing a serious waste of disk space. Normal software often requires multiple tests by multiple people to be perfected, but computer viruses are usually quickly released by individuals after they are completed on a computer. Therefore, the harm that viruses bring to computers is not only what the manufacturer expected, but also Some are caused by computer virus errors.
(3) Computer viruses cause serious psychological pressure to users. The proliferation of viruses makes users fearful and always worried about being infected by viruses. Since most people do not know much about viruses, once there is a problem such as computer crash, software Abnormal operation and other phenomena, 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 "the computer has a virus". More than 70% of computer users are worried that their computers have been invaded by viruses. In fact, not all computer phenomena are caused by viruses.
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