A computer virus is a type of malicious software / program. A Virus code when executed, replicates itself by modifying other computer programs. A computer virus is one of thousands of programs that can invade computer systems (both IBM PC and. Macintosh) and perform a variety of functions ranging . This limited its ability to replicate. Some anti-virus developers commented to me that they thought this was. The Little Black Book of Computer Viruses.
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PDF | The purpose of the research is to explore the impact of computer virus attack and provide guidelines on how individuals can protect their personal. 𝗣𝗗𝗙 | On Dec 9, , Xiaofan Yang and others published Computer Virus: Theory, Model, and Methods. A computer virus, much like a flu virus, is designed to spread from host to host and has the ability to replicate itself. Similarly, in the same way that flu viruses.
Damages caused by virus Computer virus cannot damage computer hardware. IT may cause many damages to a computer system. A virus can: A computer virus can damage data or software on the computer.
It can delete some or all files on the computer system. It can destroy all the data by formatting hard drive. It may display a political or false message very few times. Infected Flash Drives or Disks Flash drives and disks are the main cause of spreading viruses. Flash drives and disks are used to transfer data from one computer to other.
A virus can also be copied from one computer to other when the user copies infected files using flash drives and disks. Email Attachments Most of the viruses spread through emails.
Email attachment is a file that is sent along with an email. An email may contain an infected file attachment. Virus can spread if the users opens and downloads an email attachment. It may harm the computer when it is activated. It may destroy files on the hard disk or may send the virus automatically to all email addresses saved in the address book.
These websites are developed to spread viruses or other unethical material.
These websites may access the computer automatically when the users visit them. Networks Virus can spread if an infected computer is connected to a network.
The internet is an example of such network. When a user downloads a file infected with virus from the internet, the virus is copied to the computer.
It may infect the files stored on the computer. Pirated Software An illegal copy of software is called pirated software. Virus can spread if user installs pirated software that contains a virus. A variety of pirated software is available in CDs and from the internet.
Some companies intentionally add virus in the software. The virus is automatically activated if the user uses the software without downloading license. Types of Computer Virus The following are some well-known viruses. It allows the hacker to access the infected computer remotely. Nimba It is a worm that spreads itself using different methods.
IT damages computer in different ways. It modified files, alters security settings and degrades performance. SirCam It is distributed as an email attachment. One way it can spread is by plugging an infected USB drive into your computer. This type of virus exploits the code of web browsers and web pages. If you access such a web page, the virus can infect your computer.
A resident virus can execute anytime when an operating system loads. This type of virus comes into action when you execute a file containing a virus. Otherwise, it remains dormant.
A polymorphic virus changes its code each time an infected file is executed. It does this to evade antivirus programs. This common virus inserts malicious code into executable files — files used to perform certain functions or operations on a system. This kind of virus infects and spreads in multiple ways. It can infect both program files and system sectors. Macro viruses are written in the same macro language used for software applications. Such viruses spread when you open an infected document, often through email attachments.
You can take two approaches to removing a computer virus. One is the manual do-it-yourself approach. The other is by enlisting the help of a reputable antivirus program.
Want to do it yourself? There can be a lot of variables when it comes to removing a computer virus. This process usually begins by doing a web search. You may be asked to perform a long list of steps. If you prefer a simpler approach, you can usually remove a computer virus by using an antivirus software program. For instance, Norton AntiVirus Basic can remove many infections that are on your computer. The product can also help protect you from future threats.
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Other names may be trademarks of their respective owners. Security Center Malware What is a computer virus? By a Symantec employee. How does a computer virus attack?
How do computer viruses spread? What are the signs of a computer virus? A computer virus attack can produce a variety of symptoms. Here are some of them: Frequent pop-up windows.
Pop-ups might encourage you to visit unusual sites. Or they might prod you to download antivirus or other software programs. Changes to your homepage. Your usual homepage may change to another website, for instance. Plus, you may be unable to reset it.