Everything about Computer Viruses and Data Theft

Everything about Computer Viruses and Data Theft

-Dr. Lalit Kumar Setia*

How a computer virus spreads on networks?

Whenever, any user accesses such emails from non-trusted sources, visits infected websites, shares files with others, downloads free games or toolbars or other utilities, installs malicious software without fully reading terms and conditions of license agreements; computer virus easily enters inside the computer. Once a computer is infected with virus, the coded program starts working and run the commands written in it like deleting data, overwriting information, displaying messages, and even adding itself to other files of the computer. The virus damages the data and also steals the information and the users become victims. The information hacked through virus is sent to the hackers through internet. In other words, once the computer is hacked, it becomes under the control of hacker through internet. After gaining the access to computer, hackers record the websites visited by the users with accessing usernames and passwords typed through keyboard. They also get accessibility to victim’s name, address, phone number, date of birth, and other credentials available on computer.

How to detect whether there is any computer virus exists in computer or not?

Whenever a person is affected with any disease, there are symptoms of the disease diagnosed by doctor to detect the disease. Similarly, whenever any computer is affected with virus, the symptoms of computer can be diagnosed such as slow speed of computer, erratic behaviour, deleting files without permission, and frequent crashes in computer. As the hackers have accessibility to the computer, there may be frequent unnecessary downloads happening on the computer. Such downloaded software will be malware and other types of viruses, demanding clicks from user. The setting in browser will automatically be changed like change in default browser, default homepages, and unnecessary shown advertisements in browsers. 

*Copyright © 2017 Dr. Lalit Kumar. All rights reserved. 

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