A computer virus is a computer program that can duplicate or copy itself [1] 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 below 1.4 (and Unix, as the 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. Viruses are malignant will damage the hardware and the like.
Types of Computer Viruses
A computer virus itself is a general term to describe all types of attacks against computer. However, when categorized by the way it works, computer viruses can be grouped into the following categories:
Worm - Menduplikatkan himself on the hard disk. This makes the computer resources (hard drive) into the worm's full.
Trojan - Capture data on infected computers and sends itself to the trojan creator.
Hacking - is a direct attack from hackers for computer users who access certain Internet pages, with or without the assistance programs that have been inserted in the user's computer.
Backdoor - Almost the same as a trojan. However, Backdoor usually resembles the files fine. For example games.
Spyware - Virus that monitors the infected computer.
Rogue and Ransomware - is a program that mimics the antivirus program and show antiviral activity like normal, and giving false warnings about the presence of viruses. The goal is to let users buy and activate the fake antivirus program and make money for those rogue virus maker.
Rootkit - A virus that works like an ordinary computer system working alone.
Polymorphic Viruses Viruses are fond beubah change order can not be detected.
Cell Phone Virus - a virus that specifically run on cell phones, and can cause various effects, ranging from cell phones damage, steal data in cell phones, to make calls in secret and spend credit cellular phone users.
Remedy Computer Virus
Virus attacks can be prevented or overcome by using antivirus software. This kind of software can also detect and remove computer viruses. Computer viruses can be removed with a database / database / Signature-based detection, heurestik, or ranking of the program itself / Quantum. Used by Norton.
Example of a reliable antivirus and counteract the virus is Kaspersky, Panda, Symantec, BitDefender, avast!, AVG, Avira AntiVir, Norton, Norman, McAfee, and others.
