Computer Virus and its remedy


 

In this blog we will learn about following

  • Computer virus and its effect
  • Spreading and detecting of computer viruses
  • Protecting computer from viruses

Virus is harmful it effect computer a lot. A virus can be introduced to a computer. Like software virus is also set of instructions or code. Thus  virus can be introduced to a computer system along with any software program. It is a type of destructive program developed by program with objective to corrupt or delete data, information and other useful program.

The firs commercial virus appeared in 1985AD. A computer virus is a harmful program that disturbs the normal functioning of computer. It can hide itself in other host files so it is not visible to users. It has capability to replicate itself by making copies of itself with out the knowledge of the user. The main purpose of virus is to infect as many program as possible.


Virus usually transfers from one computer to another through internet or infected storage device such as hard disk, compact disk and pen drive. When you use virus infected program files the virus becomes active and performs its destructive task such as displaying unwanted message, deleting files and programs, changing the contents of files, corrupting files and application software, changing location etc. Virus can reduce the available memory space for other program and run unnecessary program in computer.


What do computer viruses do?
Virus is designed to corrupt other programs and alter the way those program work. The impact of a virus can range from general irritating to making your computer crash. Different viruses show different symptoms in the computer. There are no fix effects or symptoms of computer viruses. Therefore it is difficult to know whether a computer infected with viruses or not. When virus infect the computer you will see the following symptoms in your computer system:
  • Program take longer time to load
  • Corrupt the data, information or program
  • Program run automatically without any instruction
  • change the size of files in the computer
  • frequently display unusual error message or images on he screen
  • new program installed incorrectly
  • sometime computer may not boot and hang quickly
  • Program file hidden from the computer
  • Display low memory message frequently
Spreading of compute virus
Virus can spread from one computer to other computer through different external sources like infected hard disk, CD/DVD and pen drive. Computer viruses can also transfer themselves on the network or internet computers without the knowledge of user. Some of the ways through which viruses spread from one computer to other computer are:
  • Sharing of infected pen drive, CD/DVD, hard disk etc. among the computer
  • by downloading files or programs from unsecured web sites
  • use of infected data or programs residing in the hard disk
  • the use of pirated software
  • exchange of infected data or files over a network
  • opening virus infected email message or attached file without scanning
Remedy of computer Viruses
Remedy computer viruses is system of computer system free from viruses. You can make your computer system free from viruses using antivirus software. Antivirus is a type of computer program designed to detect and remove viruses from computer system. It prevents and cleans up computer viruses, which may attempt to infect your computer system. It will scan downloaded files as well as your entire computer system in order to detect the presence of an infection. Antivirus can be a memory resident and keeps monitoring the computer system and informs a user about the virus if it is found. There are a number of antivirus software used in computer to detect and remove viruses. Some of the popular antivirus are listed below:
  • Kaspersky Antivirus
  • Norton Antivirus
  • AVG antivirus
  • Avast Antivirus
  • NOD 32 Antivirus
  • Avira Antivirus
  • Panda Antivirus
  • McAfee Antivirus
Protecting computer from viruses
Viruses are harmful programs that affect our computer system. Virus can damage or corrupt our important and program, slow down the system. Therefore protection and prevention of our computer from viruses is important. There are number of ways to ensure the security and prevent an infection of you computer system from viruses. To protect computer from viruses, we must follow the following points:
  • Use password to prevent computer from unauthorized access
  • Install and use antivirus software
  • update the antivirus software regularly to get the latest virus 
  • Do not open attachments files from unknown emails
  • Download software only from reliable and well known websites
  • use always genuine software do not use any pirated software
  • scan floppy disk, CD/DVD , pen drive and other external storage media before they use
  • Do not open USB flash drive by double clicking
  • do backup your entire system regularly

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