What is a computer virus and its types? How does a computer get infected with a virus?

 

What is a computer virus and its types? How does a computer get infected with a virus?

Today  we will talk about  a computer virus  ,  what is  a  computer  virus  (what is a computer virus), how many types of computer viruses are there, what are its symptoms, what are the ways to avoid viruses, and in the computer how do you remove or eliminate the virus when it comes? In this post, we will see all this in detail.

Computer Virus from Fulform  -  Vital Information Sources Occurrence  under Seizure  . A computer virus is a virus  that can enter the  computer and any   other electronic gadgets by any means or means, and it  can destroy or steal the data of  the computer hard disk and  can also delete any data or file. A computer  virus is a type of software that travels on a fast computer.

Computer viruses cause billions of dollars in damage each year. The purpose of most viruses is to control Microsoft Windows by controlling the system, so to combat this virus, programmers created antivirus programs.

computer virus (computer virus)

Now let's talk about  a computer virus -  “A computer virus is a type of malware.  It is a program, or a small piece of computer code, that runs automatically in your computer and enters your computer without your permission and infects the system and infects your system. It causes a lot of damage.”

Computer viruses can also be used by downloading files from the Internet, opening  infected websites,  exchanging files over the Internet,  clicking on  executable files  , opening advertisements of  infected websites,  or using an infected USB drive from one system to another. It can cause  this virus  also damage  the hard disk storage  for the computer by deleting important data files from your computer  .

When you open an infected program, a floppy disk, a CD, a USB drive or an  email attachment  , the virus enters the system that gradually spreads in the computer and occupies the entire hard disk space as well as  corrupts the  data. ,  delete  or  harm  and also slow down the speed of your PC.

Some hackers  create a  "  computer virus  "  with the wrong intent  and deceive online users through the Internet to introduce the virus into their system and their goal is to take over the system by infecting the system and stealing sensitive personal data.

Types of computer viruses 

There are many types of computer viruses, computer viruses are divided according to their infection and behavior, and among them some special types of computer viruses are described below.

boot sector virus

This virus infects the main boot sector of any device or system from the root, and frequently causes the system to crash before the operating system is loaded, causing the operating system to crash. To remove it, the system must be formatted, usually spread through disks or removable media.

File Virus

This virus harms the executable file of the computer, which is called a file virus. Executable file is the file which is mainly used to install software like while installing .EXE file, virus is also activated along with it causing the file to be completely corrupted.

polymorphic virus

This virus uses cryptographic malicious code that is hidden in the system. It is a complex virus so it is very difficult to detect it with any antivirus software. This type of virus is also able to easily copy its software. Here are the names of some polymorphic viruses, such as Satan Bug, Tuareg, Marburg and Elkern.

overwrite virus

This virus overwrites files saved on your computer, which usually infects and deletes files, although it is not harmful to your system. The only way to remove this virus is to completely delete the infected file, as a result, your data files will disappear. These viruses spread via e-mail, which is difficult for a computer user to detect. So, avoid opening unwanted email attachments.

macro virus

This virus is specifically aimed at damaging certain types of files such as word processing applications, spreadsheets (MS Excel, MS Word), etc. This virus only damages MS office program files. A macro virus spreads when a user opens an infected document or spreadsheet. It is usually sent through an email attachment. The most common examples of macroviruses are Bablas, O97M/Y2K, Melissa.A, and Relax.

Browser Hijack Virus

This virus modifies the web browser settings without the user's permission, after which it is redirected to various websites and displays an unwanted advertisement on the user's web browser. Example - When you enter the url in the browser address bar, the browser hijacker virus takes you to another infected website instead of going to that website.

web programming virus

This scripting virus is associated with some tempting advertisements, linking, placing images, or video among other things through the website and when you click on it the malicious code is automatically downloaded to your computer or other device or it can also be redirected to Infected website. Theft of personal data from your browser.

direct action virus

A direct action virus is attached to a specific type of file on your computer - .exe or files with a .com extension. When this type of file is handled, it becomes active and infects other similar files or folders in the same way. Although this virus is not very dangerous, it can be removed with the help of antivirus software.

Symptoms of a computer virus (What are the symptoms of a computer virus)

By now you must have understood what a computer virus is and   how many types there are? If there is a virus in your computer, how will you or know it? When a virus comes into the computer or mobile phone, they themselves begin to give us signals. Let’s see some of these symptoms to know if viruses are present in your computer or not-

• If   your computer  slows down or  hangs  more than usual  , this could be a symptom of a virus.
• If  the pop-up box   or message  appears frequently on your computer screen,  there may be viruses.
• If your internet speed has slowed down for more than a while.
• If an error message  or  a warning alert appears   on your screen while using the browser,  it may be a virus.
• If any document or program cannot be opened in your computer.
• Install a program or file on a computer without your permission.
• Automatically opening  unwanted files  in your computer  or automatically copying this file.
• When some webpage is displayed in your browser without a URL request.
• Your computer's memory, such as RAM or hard disk, is running out of space, which  can  lead  to a system crash  .
• If you cannot connect to the network, use a CD or USB drive.

Measures to avoid computer viruses (computer virus protection)

Currently, most everyone uses the Internet and technology, but most people do not realize the danger caused by it, and how a  computer virus can   damage important data in their system, so knowledge of threat metrics  from the  Internet must be needed.

1)  Use a good  antivirus on  your computer  because the more you connect to the internet, the greater the risk of viruses, worms and trojans, so use a good antivirus in your computer.

2) Do  not download the document or third party application from  any  untrusted website  or link  .

3) prize, mobile or sweepstakes, then never click on that advertisement because there is a higher risk of malware or other virus in it.

4)  controls the firewall  to protect  your computer to  install a firewall in the emerging data exchange in Kanputro other than your computer.

5) Unauthorized or pirated software should not be installed on the computer.

6)  Beware of   unknown  email attachments , and do not click on links or ads in any email if that sender is unknown.

7) Check the file extension of an unknown email attachment carefully, if the extension is exe, pif, bat, cmd, cml, inf, js, msi, scr or vbs then don't open this file Without scanning it for viruses.

8) Before connecting your hard drive or Pendrive to your computer, scan your computer with infected antivirus otherwise pendrive can harm your computer.

9) If you have an important data store in your computer, you should definitely take a backup because there is no antivirus that does not provide 100% complete protection for your data.

What do you do when the virus strikes? (What to do if the virus gets infected)

Suppose for example, despite taking all these security precautions, that there is a virus problem with your computer, then in such a case, take the following actions:

1) If your computer has an antivirus, scan your entire system through it, to find out how your computer is infected with viruses.

2) If your current antivirus is unable to detect new viruses,  update your  antivirus  or install  a  new antivirus and then scan the system.

4) If you suspect the quality of the antivirus program  of  your own  ,  do scans your computer by downloading antivirus software through a Web called site  Malware Byte   or  the Super Anti Spyware  , but keep in mind that these anti - virus programs paid but version Only outstanding. Free for 14 days.

3) If you use it by installing a free antivirus in your computer, it is better to improve the efficiency and security and it can spoil, so the best is to get  a paid antivirus  to do. Such as Quick Heal, Kaspersky Internet Security, McAfee, K7 antivirus, BitDefender, etc.

5) If the computer virus causes further damage to your data and computer, you can contact your computer specialist for data recovery and computer repair.

conclusion:

Hopefully, through this post, you must have understood  Computer Virus  (what is a computer virus), its types, ways to avoid it, etc. Every user of the Internet should be aware of what a computer virus is at the moment. If you  learned something or liked from  this  post (what is a computer virus)  , then definitely share this post.

This video explains What is a computer virus and its types? How does a computer get infected with a virus?