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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