What is a Computer Virus?
A computer virus is an external program intentionally made for the purpose of changing the properties of the files it infects in order to execute some commands either to remove, modify or sabotage and the like. That is, computer viruses are programs that are written by professional programmers with the purpose of damaging another computer, controlling it, or stealing important data, and they are written in a specific way. A computer virus is characterized as a program capable of replication and spread. The virus attaches itself to another program called the host. Viruses cannot arise from themselves. It can be transmitted from an infected computer to another healthy one. A virus is a program designed to spread itself between files and merge or stick to programs. When you run the infected program, it may infect the rest of the files in it on the hard or floppy disk, so the virus needs intervention on the part of the user in order to spread.
How Viruses Work?
The one who created the virus programs the virus and directs commands to it, where it determines the time, w and how the virus starts to become active, and usually enough time is given for the virus to ensure the freedom to spread without drawing attention to be able to infect the largest possible number of users, and viruses differ From where the activity started, there are those who start with a specific date or time, and there are those who start working after executing a specific command in the infected program, and there are viruses who start the activity after reproduction and reach a certain number of copies. And after the virus is active, the virus performs several subversive activities according to the purpose of creating that virus. There are those who display a message that underestimates the user or displays a warning message about the memory fullness and there are other types that delete or modify some files and there are those who repeat and copy themselves until It completely paralyzes your computer and there are more deadly types that wipe all the information from the hard drive.
What Are the Reasons Behind the Spread of Computer Viruses?
The reasons for the spread of viruses on users' computers vary in the world, the most important of which are:
These viruses spread through programs that are downloaded from the Internet, especially when relying on anonymous websites, and as soon as the user installs the program on the device, those viruses are activated to play their role in damaging the device.
Some users resort to using the so-called crack, which is a small tool that is resorted to activate the programs that need money to buy and the ability to install them and are called paid programs. This tool runs the program for free, but it carries in its bag many viruses that penetrate the computer. Exchanging infected files between users by linking two devices together, one of them infected with viruses, of course, it affects the healthy device, and those viruses are easily transmitted to the other device.
How to Protect Our Data From Viruses?
1- It is necessary to install antivirus programs on the device and run it throughout the period of use of the device. This enables these programs to search for and destroy viruses, whether weekly, daily or upon operation.
2- Do not open any file attached to an e-mail message or any other program such as Messenger, regardless of its source, except after examining it using an antivirus program, provided that the source of the message is known, and that you expect this file to arrive because some viruses send themselves Names of other people via address book .. so beware of that.
3- Follow up on virus news and ways to deceive them by the user, through technical news sites, daily newspapers, or newsletters, with the aim of taking the necessary precautions and not falling into the trap of this new virus.
4- Make sure of the source of any program you download over the Internet and check it with the antivirus program that you use before installing it on your computer.
5- Disable the device's download feature from the floppy drive
6- It is also necessary to update virus explorer programs periodically, by obtaining them from the manufacturer, or from various Internet sites, in order to ensure that you have the latest information and symptoms about new viruses, and how to prevent them.
7- Running virus explorer programs, and checking any new files or programs that reach you via e-mail, the Internet, and floppy disks, and not allowing the entry and operation of any files or programs of an unknown source without prior examination.
8- Pay attention not to start or restart the computer with the floppy disk in its location, as some of these viruses hide inside the floppy disk until you find the appropriate opportunity to run, then download programs through reliable sites.
What is Antivirus Software and How It is Useful?
antivirus programs are called several names, including antivirus programs and antivirus programs. antivirus programs vary and differ in the benefits they provide for private computers. Virus programs are used to protect your computer from malicious programming or viruses that can easily penetrate your computer without your knowledge.
With the constant development of technology that we touch on a daily basis, this malware and viruses are developed at the same rate. Thus, the goal of antivirus programs is to protect the user's personal data that is stored on the computer, such as personal photos or important account files, and other details that are extremely dangerous if a hacker sees them on the computer.
What is Antivirus Software?
Antivirus programs can be defined as programs that detect malicious files that may infect the computer and work to remove them automatically on the one hand, and on the other hand, they act as a buffer to protect accounts on the computer interface when connected to the Internet against spyware and other malicious programs that may infect The device, and antivirus programs are considered among the surest methods that the user can rely on in detecting any viruses that may have attacked his device. And the antivirus program consists of two different parts:
1- Direct operation upon entry: - This part works automatically when running (entering) programs or downloading files from the Internet, which is known as the On-Access element.
2- Operating on demand: - This part works when you ask him to do so, and he is a specialist in detecting viruses and Trojans (TROJAN) in the hard disk, soft disks, and CDs, which is known as the Demand element.
The process of removing the virus from the device is an uncomplicated issue as there are a variety of programs that help protect the computer from viruses, especially when browsing websites or downloading files from the Internet that may be equipped with viruses that cannot be detected without relying on someone most premium antivirus.
Antivirus software is divided into two parts; The first is antivirus programs on the computer and the second is protection programs on the Internet, and antivirus programs are distinguished for having tools that enable them to detect any viruses on the computer and work to delete them, and they lack many protection techniques, meaning that their work is limited or limited to specific tasks In the protection process, it lacks some technologies, and it is suitable for owners of devices with simple specifications due to its lightness on the system, while Internet protection programs have a set of protection tools and technologies that help the user to fight viruses while browsing websites and thus ensure a higher degree of security than regular antivirus programs It contains some system repair tools, system backup tools, controls the operation of applications and powers them, and other important tools.
The harmful viruses that can infect your computer are varied, and they are generally programs that were developed with the aim of destroying the operating system of your device, which exposes the internal storage memory of the device to damage and thus the loss of all your files stored on them. Another type of virus depends on spying on your personal information and stealing it, and the most prevalent type is spyware programs called spyware and the danger of these viruses is that they penetrate the user's device without his knowledge and spy on all his private information, including identifying all websites that The browser visits it, which ultimately leads to the virus program taking control of your device and changing its settings.
How Antivirus Software Works?
antivirus programs rely on specific software codes that enable them to identify files that are infected on your computer with viruses, by comparing the name codes of your files with the name codes within the virus dictionary. Whenever a name matches one of the names, then the antivirus programs remove the virus from within the file The injured while preserving its contents without deleting. These programs can also detect those programs that on their face are working to fix an error on your computer, but they work on spying on you and collecting personal information about you.
When the antivirus program finds the malicious viruses inside one of the device files, the antivirus program displays a set of options for the user to decide what he wants to do about that virus, and the options vary to include; Delete the virus from the device permanently or put it in another place where it cannot control your device, or perhaps delay the decision regarding that virus. Also, all antivirus programs depend on continuous updates from the Internet and this is due to the need to update the virus dictionary so that all information about new viruses that develop quickly every day is available for the antivirus program installed on the computer.
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