Computer Viruses and their Effects on your PC
Table of Contents
What is a Virus? .............................................1
HOW A VIRUS INFECTS YOUR SYSTEM: .............................2
HOW DOES A VIRUS SPREAD? .....................................3
BIGGEST MYTH: "I BUY ALL OF MY PROGRAMS ON CD ROM FROM THE
STORE". STORE BOUGHT SOFTWARE NEVER CONTAINS VIRUSES.... 3
INFECTION (DAMAGES) ..........................................4
PROTECT YOUR COMPUTER, NOW!! ................................ 5
A virus is an independent program that reproduces itself. It can attach itself to other programs and make copies of itself (i.e., companion viruses).
It can damage or corrupt data, or lower the performance of your system by using resources like memory or disk space. A virus can be annoying or it can cost you lots of cold hard cash. A virus is just another name for a class of programs.
They do anything that another program can. The only distinguishing characteristic is the program has ability to reproduce and infect other programs.
Is a computer virus similar to a human virus? Below is a chart that will show the similarities.
Comparing Biological Viruses & Human Viruses
Human Virus Effects
Attack specific body cells' Modify the genetic information of a cell other than previous one. It performs tasks. New viruses grow in the infected cell itself. An infected program may not exhibit symptoms for a while. Not all cells with which the virus contact are infected. Viruses can mutate and thus cannot clearly be diagnosed. Infected cells aren't infected more than once by the same cell.
Computer Virus Effects
Attack specific programs (*.com,*.exe) Manipulate the program: The infected program produces virus programs. The infected program can work without error for a long time. Program can be made immune against certain viruses. Virus program can modify themselves & possibly escape detection this way. Programs are infected only once by most viruses.
There are many ways a virus can infect you system. One way is, if the virus is a file infecting virus, when you run a file infected with that virus.
This particular kind of virus can only infect if YOU run the program! This virus targets COM and EXE files, but have also been found in other executable files. some viruses are memory resident which will infect every file run after that one. Other are “direct action” injectors that immediately infect other files on your hard drive then leave. Another way viruses infect your system is if they are polymorphic. Polymorphism is where the virus changes itself with every infection so it is harder to find. Also, virus writers have come up with a virus called a multipartite virus. This virus can infect boot sectors and the master boot record as well as files therefore enables it to attack more targets,
...ies on other programs for it to continue to spread and often times the same program can be hit by the same virus several times. Cracking these codes and viruses is much harder to figure out. It’s almost like these virus writers make it a puzzle to solve before you can actually disband the virus itself. Even when the code is cracked and disassembled, writers normally just rewrite that code to do the exact same thing again.
Viral infections are caused by different kinds of viruses. They have a simple structure and are tinier than bacteria by a landslide. Viruses can only survive in a host, and are unable to reproduce by themselves, instead they use the host’s DNA to multiply and repair. Most viruses are harmful to the human body and cause disease. They direct themselves to infect the cells in the liver, respiratory system, and blood. Which cause diseases like the flu, chickenpox, Aids, herpes, etcetera. Viruses are also involved in many forms of cancer. They
Many viruses are so good at covering their tracks that you may not even realize they are t...
... to get user data back (“Ransomware”). This means that criminal is using a computer by locking your computer by passing your permission on the computer. This makes it possible to make millions of dollars by making viruses and scams in less than one hour (ComputerCareClnc). In the computer world we will never find the true answer.
A virus is an infective agent that typically consists of a nucleic acid molecule in a protein coat. It is too small to be seen by light microscopy and is able to multiply only within the living cells of a host. One virus that has received global attention over the last thirty years or so is the HIV/AIDS virus. This virus attacks the body’s immune system, which in turn stops the body’s ability to be able to fight off illness. Thus, people who contract HIV/AIDS are susceptible to death by sicknesses that a healthy individual is able to recover from easily.
What is virus? A computer virus, according to Webster's Collegiate Dictionary, is "a computer program usually hidden within another seemingly innocuous program that produces copies of itself and inserts them into other programs or files, and that usually performs a malicious action (such as destroying data)". Two categories of viruses, macro viruses and worms, are especially common today. Computer viruses are never naturally occurring; they are always man-made. Once created and released, however, their spread is not directly under human control. One example of a virus is the Anna Kournikova virus, which comes in the form of a picture sent through email.
Virus- An infectious agent found in virtually all life forms, including humans, animals, plants, fungi, and bacteria. Viruses touch us every day through water, food, physical contact, blood, animals, or even, the air you breathe. All though most are harmless there are some that...
can be very severe and even lifethreatening, the amount of protection from these viruses that
Hackers and computer criminals also use computer viruses to either do some odd job or just reek havoc. "Virus" is the one computer-security buzzword that has made its way into the mainstream. Most people do not know exactly what one is, but that it's bad.
Malware is defined as “a program that is inserted into a system, usually covertly, with the intent of compromising the confidentiality, integrity, or availability of the victim’s data,
Computer Viruses are a form of malware that are small software programs that can spread to different computers. They cause interference to your computer’s operations,
Although the things listed above are very crucial having an anti-virus program and keeping it up to date is something that should be heavily paid attention to. This is beneficial because it detects and helps to remove the virus before it can do much damage. Make sure that you choose a well-known antivirus program.
A virus is a piece of code that spreads through some user interaction(going to a shady website or downloading a file), usually written with evil intentions. A virus infects files that already exist on systems. They are not their standalone programs. It is designed to wreak havoc on a computer and spread itself from one file to another, then from computer to computer. (“What Are Viruses, Worms, and Trojan
A computer virus program is altering program and it replicated itself by coping itself into other programs stored in a computer.
Malware can survive in a number of ways say different sizes, shapes and also the purpose ranging from viruses to spyware and to bots. Malware in general is classified into two types. They are the concealing malware and infectious malware. In case of infectious malware, the malware code is said to spread all over which means that the software code shall replicate from one user to another and this goes on. In infectious malware, we need to consider two cases, which are called the viruses and the worms. Viruses are termed as the software that has executables within itself and causes the executables to spread when it is run. The second case called worms is a software which infects a computer and then spreads to others.