Different types of viruses in computer pdf download

The society will also benefit by attaining knowledge about the different types of computer viruses and the measures of prevention of infection. Different types of computer virus classification are given below. All humans contract multiple viruses throughout the course of life. Com files, data files such as microsoft word documents or pdf files, or in the. When a user downloads the program and then executes it. No part of this document may be reproduced or transmitted in any. Computer viruses are the types of software programs which are written for the purpose of entering a computer system without authority or. It is important that you are aware of the different types of viruses that are affecting your computers. A computer virus is a type of computer program that, when executed, replicates itself by. Companies, names, and data used in examples herein are fictitious unless otherwise noted. A boot sector virus infects the first sector of the hard drive, where the master boot record mbr is stored.

Viruses that infect program files may attach the virus code to locate suitable object to infect attach the virus code to the object. Viruses can be disguised as attachments of funny images, greeting cards, or audio and video files. Learn more about different types of viruses on computers. A computer is infected when a copy of the virus resides in the machine. Macro virus is one of the most common types of viruses for various rea. Viruses are also tools of hackers to gain unauthorised access to your system and steal private information. The problem is that malicious code may be hidden in the downloaded sw.

Other threats include trojans, adware, worms, and malware, among others. There are different types of computer viruses that can be categorized according to their origin, spreading capabilities, storage location, files they infect and destructive nature. A computer virus is a type of malicious software program. Download the virusmalware scanner using the internet. Cold, flu, stomach and hepatitis viruses are among the most common types of human viruses encountered worldwide. There are a couple of different types of computer viruses. Computer viruses are classified according to their nature of infection and behavior. Different types of computer viruses computer virus. Over 40,000 different viruses have been cataloged so far and the number of viruses is increasing dramatically. Human viruses cause a variety of maladies, depending on the virus type and the tissues infected. Computer viruses also spread through downloads on the internet.

These classifications take into account the different ways in which the virus can infect different parts of a system. Various kinds of antivirus software have been developed which detect viruses and take corrective actions. However, one common requirement is that the virus code be executed when the object is used. Computer viruses and related threats nvlpubsnistgov. A computer virus is a computer program that can spread across computers and. Trojan horses, computer viruses are instances of malicious logic or malicious programs. When we talk about computer security, the virus is the leading threat. Analysis of various types of viruses and their remedies. The master boot record mbr stores the disks primary. Now, viruses are still widespread, affecting pc performance. Computer viruses from an annoyance to a serious threat. Lets elaborate on these kinds of viruses and see how they actually work.

What are the different types of viruses in a computer. Pdf computer viruses have been around since the mid 1980s. The severity of viral illnesses ranges from mild to lethal. It is important that you are aware of the different types of viruses that are. For internet users, this threat can come from downloading files through ftp file. Computer viruses come in different forms to infect the system in different ways. Malware encompasses computer viruses along with many other forms of. Computer viruses are the types of software programs which are written for the purpose of entering a computer system without authority or the users knowledge. Computer virus strategies and detection methods rims, kyoto.