Skip to main content

What is Computer Virus

What is Computer Virus


What is Computer VirusWhat is Computer Virus - Virus is an executable program which attaches itself to a program or file enabling it to spread from one computer to another, leaving infections as it travels. Almost all viruses are attached to the executable file and it will affect only when these executable files are opened or executed. The virus is spread from one computer to another by sharing infected files or sending emails with viruses as attached in the emails.

How we get to know a virus has attacked our computer?


  1. An annoying message appearing continuously on computer screen.

  2. Reduced memory or disk space instantly.

  3. Automatic modification of data.

  4. Files overwritten or damaged

  5. Hard drive erased



If we see any of the errors prompting on our computer screen then we get to know our system gets affected with computer virus.


Types of Computer Viruses



  1. File Virus – Major attacks are due to these types of virus. This virus attaches itself to the program files.

  2. Boot Sector Virus – These viruses infect floppy and hard drives. In this case, the virus program is loaded before the operating systems.

  3. Macro Virus – This type of file infects documents. This type of virus uses an applications own macro programming features to distribute themselves. It does not affects programs but documents

  4. Virus Hoax – The category of virus fall under imaginations to the public.



What is the difference between Virus, Worms and Trojan Horses


All the three are malicious program files that damage the computer, but they are totally different according to the conceptions.


What is a Worm?


A worm is a program similar to virus and is considered to be sub class of Virus. It travels from one computer to another without human interventions. It took the advantage of transport features of files and information. The biggest danger with the worm is its capability to replicate itself. A single worm can create hundreds or thousands of copies of itself, creating huge devastating effect.


Example – Blaster worm – the worm has been designed to tunnel into the system allowing malicious users to control the computer remotely.


What is a Trojan Horse?


The Trojan Horse tricked program by which a legitimate source enters someone computer backdoor giving malicious users access to computer system. This type of malicious program hack confidential or personal information from someone's computer system. Trojan Horse do not reproduce by infecting other files nor do they self replicate.


How to Remove Virus from our Computer?


There are some antivirus software which is available on market, which protects our computer from Virus as well as Trojan and Worms. There are two main ways of virus removal.



  1. Use of Heuristic Algorithms – Heuristic detection is generic detection designed to detect new or previously unseen malware. So it can be useful for detection and prevention of new malwares.

  2. Using Virus Signature and definition – During a virus scan, antivirus software compares the content on a computer against its virus definition database. The virus definition database, enables antivirus software to effectively detect viruses upon the discovery of any of the code included in the virus definition database.



This is all about What is Computer Virus which we must know in order to keep our computer in correct manner.


Popular posts from this blog

When Task Scheduler gets Infected by Malware

When Task Scheduler gets Infected by Malware

When Task Scheduler gets Infected by Malware - We are familiar with malware attacks on Computer. The hackers infect one or more files and thereby attaining full control on the System. There are millions of victims who had loosen either data or dollars in this respect. In this article we see a System file which is infected by these hackers at first stage. The System file infected by malware at first stage is Task Scheduler Engine (Taskeng.exe). The Task Scheduler Engine is a system file located in C:\Windows\System32 folder. This location is the default location for Taskeng.exe.



The Task Scheduler Engine is responsible for keeping track of tasks set to run at a time predefined by the user of the PC. As said earlier, the original location of this scheduler is C:\Windows\System32 folder. But it is suspicious if the location of scheduler gets change. If it is found in some other folder then it must be infectious. As a result, you constantly get a…

How to Project Android Phone Screen on Windows PC

How to Project Android Phone Screen on Windows PC


Project Android Phone Screen on Windows PC - Four out of Five of us have Smartphones in our Pocket. We spend lots of time on Smartphone utilities like Facebook, Twitter, WhatsApp, YouTube and other interesting Apps. These Smartphones are tremendously used due to Android Operating System installed in it. Android OS is one the successful mobile based OS running in the market.

On the Other side, Microsoft is emphasizing on features to ease Android user's connectivity with it. Microsoft has done lots of improvement for mobile utilities to the Windows 10 version 1809. With this upgradation, we can easily project Android phone screen on Windows PC. The extensive use of such features is seen on Digital Smart TVs Today. The introduction of Wi-Fi feature makes more reliable and user friendly.

So, if you are boredom with 5-6-inch Android Screen and want to mirror it on Computer screen, then read the full article to know the process, how to proj…

Fix Windows could not find a driver for your network adapter error

Fix Windows could not find a driver for your network adapter error


A Computer run smoothly with the coordination of Software & Hardware. In the absence of any one it will not run at all. Software being the Master utilizes each hardware attached to the System. And each hardware is operated with the help of Device Drivers installed in it. Operating System (OS) uses these device drivers to control & utilize each hardware when needed. Each hardware connected to the system must have their own Device Driver installed. A device driver is a program to initiate a hardware when required by Operating System.




Suppose, you want your PC to connect to the Network, it can only be possible when your PC has network related Device Driver. These Device Drivers are easily downloaded from Manufacturer Websites. In this article we focus on Network related problem. Suppose, your PC not obtaining Network connectivity. And each time you are getting an error message saying "Windows could not find a d…