Computer Viruses

A computer virus is a computer program that can duplicate or copy itself and spreads by inserting copies of itself into other programs or documents. Computer viruses can be analogous to a biological virus that spreads by inserting itself into living cells. Computer viruses can be destructive (for example, by destroying data on the document), making computer users feel annoyed, or have no effect at all.
How It Works

Computer viruses generally can damage computers and software can not directly damage the computer hardware in a way to load a program that forced over-process to a specific device such as VGA, Memory and even processors (especially in operating systems, such as the family of Windows-based operating systems (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, Windows Vista Service Pack 1) and even GNU / Linux. The negative effects of computer viruses is primarily to reproduce itself, which makes the computer resources (such as real-time CPU, memory usage) to be reduced significantly. Nearly 95% Virus is a computer virus based on the Windows operating system. The remainder, 2% against the Linux / GNU with the kernel version 4.1 under (and UNIX, as a source of Linux, of course), 1% attacking Macs, 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. A virus that will destroy malignant and similar hardware.