Here is your essay on computer viruses ! the age of information has essentially made communication faster with advent of computer and internet. Human interaction has revolutionized with information including data, pictures, emails, programs etc. So is the network of computers which can also communicate malicious programs superfluously without the knowledge and intent of the users of the computer system. Such an attack is called as virus attack and is an electronic infection affecting your system and destroying useful information. A computer virus is basically a software program that transfers from one system to another connected on a common network. Computer operations like use of email system, stored information on the hard disk, accessibility to other resources on the desktop can get difficult or corrupted after a virus attack as the program renders some or the other functionality in your computer useless. Most often it is email attachments with unusual extensions that are used to spread such viruses.

Any funny images, greetings, audio files that come in as attachments from suspicious sources should never be opened as they may be viruses. Some like adware and spyware cannot reproduce and thus cannot be termed as computer viruses. Active threats affecting your computer are generally trojans or worms and not viruses. A virus is able to damage the information and cause harm to your computer only after it is able to execute the code and write information to the memory. Code injection wherein executable files have some malicious codes written inside is one common way in which virus is sent over to spread on multiple computers over internet.

Even ftp for downloading can lead to a virus attack which can come maliciously along with an otherwise harmless software program. A virus attaches itself to an executable program so that it gets executed without the user even knowing it. Events that can result from virus attack can range from harmless to extremely destructive.

Irritable messages on the computer screen, pop up windows that continue to come and not go even when trying to exit, data modified on your computer, corrupted or erased hard disk, damage to files etc. Since the use of internet cannot be stopped and you can also not determine if the information downloaded contained any viruses, it is advisable to use credible anti virus software with latest updates. It warns you about any threats that a file or any information downloaded from the internet or a copied over infected file contains.

Removing a virus and undoing the damage it causes to your computer can be more stressful than preventing attack by using strong anti virus program that can detect malware as well as trojans, worms and viruses and also eliminate them before replication. Effective anti viruses are available which help to detect and remove viruses that may attack your computer. A computer virus is a contagious program which can infect other programs by modifying to replicate itself or the environment without the acknowledgement of users. It travels with the programs that contain it and may cause damage to the completeness of stored data. Virus infection takes place when a user uses an infected program on a personal computer and spread to another. It may corrupt or delete data on a computer, use of an e mail program to spread the virus to other computers, or even delete everything on the hard disk.

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Generally there are three main classes of virus known as file infectors, system or boot record infectors and macro viruses. It is a computer program that modifies program files which are usually.exe or.com files and when the program runs, virus will start to activate and do whatever it wants. A computer virus is a term used to describe malware or basically, any computer program that has the potential of copying itself onto a computer without the intervention of other programs or users. viruses include malware like adware and spyware, though this malware do not have reproductive ability amoroso 19.

A computer virus has a reproductive ability to regenerate itself and infect other computers or other applications within the same machine. Computer viruses term implies all types of unintended programs that attach themselves to applications thus hindering their work. It refers to all types of malware including computer worms, trojan horses, spyware, rootkits, and adware. These however are not viruses per se since they do not have reproductive ability peltier, 20.

malware is the general term however, that is used to describe all types of malicious code software that re designated to cause harm to computers and other applications. Malware therefore includes such objects like viruses, worms, spyware, phishing, adware, tracking cookies and rootkits. worms are nasty malware that are capable of self replicating in the computer rapidly.

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It works by production of endless copies of itself that occupy much space in machines. The main disadvantage of worms is the ability to consume a lot of space and therefore slow down the computer or the network. At no time should one open an attachment without scanning it for possibilities of worms. how to protect computer against worms activate the email scanner and in the antivirus used in the machine.