What is a virus? How is the virus infected?

The operating system changes, the computer virus must also change to be able to cling, parasitic on the new operating system. Therefore, the concepts of computer viruses are always formed and gradually expanded over time.

 

Computer virus is a software program capable of copying itself from one infected object to another (objects can be program files, text, computers .).

The virus has many ways to spread and of course there are many ways to destroy it, but you just need to remember that it is a piece of program and program that is often used to serve bad purposes.

Computer virus is man-made. Indeed, to this day, we can treat computer viruses as pathogens for computers, we are doctors who must always fight disease and find new ways to limit it. processing and destroying them. As complex problems in society, it is unavoidable that there are diseases that we have to work hard to treat or there are also diseases that cause incalculable consequences. Therefore, "prevention is better" is the basic motto and always true for computer viruses.

There are many paths that a virus can take to invade a computer.

how spread?

There are many paths that a virus can take to invade a computer. Viruses can be transmitted via local network (LAN), via email, via files downloaded from the Internet or from USB drives. More sophisticated, they can take advantage of software vulnerabilities, including operating systems, to infect computers via the network.

• Email is one of the most common and popular ways of spreading viruses on the Internet today. From a computer, the virus collects in-phone email addresses and sends fake emails with compelling content attached to the virus file to trick recipients into opening these files. All sent email viruses have quite "interesting" content. Some viruses also quote the content of an email in the victim's inbox to create the content of a fake email, which makes phishing emails seem more "real" and more susceptible to the recipient. With the same way on other victim machines, the virus can quickly spread globally exponentially.
• USB storage devices are also a significant source of virus spread, especially in Vietnam today, when USB is the means of data exchange for most computer users. From the infected computer, the virus will copy itself to all USB drives that the user will put on the computer. At this time, USB drives have become real "pathogens" and when they are put to use on other computers, the virus will infect USB from that computer again.
• The computer can also be infected if we run an unknown program from the Internet or copy the program from another infected computer. The reason is that this program may have been infected with a virus before or is itself a fake virus, when we run it it is time we opened the door for the virus to infect our machines.
• In addition, there must be a significant proportion of viruses penetrating users' computers through dangerous code that hangs on malicious websites. Owners of these websites often find ways to trick victims into visiting their website, as soon as the pre-installed malicious scripts are executed and the user's computer becomes infected. Typically this type of virus spreads through chat programs such as Yahoo! Messenger, Windows Messenger .

Software (including the operating system) always contains potential errors that are not always easily detected. These errors, when detected, can cause minor problems, but they can also be very serious errors and soon afterwards, a series of new viruses will be exploited to spread. This is a pathway to spread scary viruses because users cannot defend themselves only with caution. Because even if you are very alert, do not open attachments in strange emails, do not visit strange websites or run any suspicious program files, your computer may still be infected by viruses because they "get" through the vulnerability of the software (including the operating system) you are using.

What do computer viruses sabotage?

This will certainly be a concern for all computer users if the computer is infected with a virus. Because we know, even more or less viruses are used to serve bad purposes.

Viruses are software and man-made, so they also disrupt what their owners aim for. Viruses can seriously damage data, drives and systems, or simply just a little joking or playful with the screen, or even simply cloning a lot to score. They can also take advantage of the victim's computer to spread advertising messages, collect email addresses, or turn it into a "assistant" to attack another system or attack the network you are currently using. use. More dangerous, they can steal information such as mailbox password, credit card information or other important information. Sometimes we are real victims of viruses targeting, sometimes we accidentally become "assistants" for them to attack other systems.