? asked in Computers & InternetSecurity · 1 decade ago

What is a computer virus?

My brother is saying that the system is affected by virus.i don’t know what is virus.

plzzzzzzzzzz anybody help me.

Tahnks..

4 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    A computer virus is a computer program that can copy itself and infect a computer without the permission or knowledge of the owner.

    After gaining access, the virus may attempt to execute certain tasks, called its payload Though some viruses do little but replicate, others can cause serious damage or effect program and system performance. A virus should never be assumed harmless

  • 5 years ago

    2

    Source(s): #1 Antivirus For PC - http://moveantivirus.com/?seVf
  • Sky.
    Lv 5
    1 decade ago

    computer virus is a computer program that can copy itself and infect a computer. The term "virus" is also commonly but erroneously used to refer to other types of malware, adware, and spyware programs that do not have the reproductive ability. A true virus can only spread from one computer to another (in some form of executable code) when its host is taken to the target computer; for instance because a user sent it over a network or the Internet, or carried it on a removable medium such as a floppy disk, CD, DVD, or USB drive. Viruses can increase their chances of spreading to other computers by infecting files on a network file system or a file system that is accessed by another computer.[1][2]

    The term "computer virus" is sometimes used as a catch-all phrase to include all types of malware. Malware includes computer viruses, worms, trojans, most rootkits, spyware, dishonest adware, crimeware, and other malicious and unwanted software, including true viruses. Viruses are sometimes confused with computer worms and Trojan horses, which are technically different. A worm can exploit security vulnerabilities to spread itself to other computers without needing to be transferred as part of a host, and a Trojan horse is a program that appears harmless but has a hidden agenda. Worms and Trojans, like viruses, may cause harm to either a computer system's hosted data, functional performance, or networking throughput, when they are executed. Some viruses and other malware have symptoms noticeable to the computer user, but many are surreptitious or go unnoticed.

    Read more at these link:

    http://en.wikipedia.org/wiki/Computer_virus

    http://www.microsoft.com/security/antivirus/whatis...

    http://www.microsoft.com/canada/protect/computer/b...

    http://en.wiktionary.org/wiki/computer_virus

  • Anonymous
    1 decade ago

    mal were is the correct term

    It's any code\script\program

    That slows or has a negative effect on computers performance

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