Definition about Computer Virus
Computer virus is a computer program that can copy or reproduce itself and spread by itself to insert a copy of the program or other documents. Viruses can damage a computer (for example by destroying the data on the documents), make computer users feel disturbed, and not to cause effects at all.
Computer viruses can damage the general computer software and can not directly damage hardware with a computer how to load a program that forces over the process to a specific device such as VGA, Memory Processor even (especially in the operating system, such as family-based operating system of Windows (Windows 95, Windows 98/98SE, Windows NT, Windows NT Server, Windows 2000, Windows 2000 Server, Windows 2003, Windows 2003 Server, Windows XP Home Edition, Windows XP Professional, Windows XP Service Pack 1, Windows XP Service Pack 2) even GNU / Linux. The negative effect is virus multiplication, particularly computer itself, which makes resources on the computer (such as CPU time, memory usage) to be reduced significantly. Almost 95% of a virus, the virus is a computer-based Windows operating system. The remaining 2% attacked Linux / GNU with kernel under version 1.4 (and Unix, as the source of Linux, of course), 1% Mac attack, especially Mac OS 9, Mac OS X (Tiger, Leopard). 2% more attack other operating systems such as FreeBSD, OS / 2 IBM, and Sun Operating System.
Attacks the virus can be prevented or overcome by using antivirus software. This type of software can also detect and remove computer viruses, provided that the data base computer virus, which is owned by the antivirus software already contains the code to remove the virus.
The example of viruses is the Worm, Trojan, etc.. Examples of antivirus software that can be unreliable and prevent the virus is KasperSky, AVG, AntiVir, PCMAV, Norton, Norman, and McAfee.
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