Types of Computer Viruses
A computer virus is a program that is designed to damage your computer, programs, and files. Like a virus in a living thing, a computer virus can spread if it is not removed. Some viruses are more dangerous than others. One of the most common places for a computer virus to appear is on a file found on the Internet or attached to an E-mail. For example, you may have a virus that just pops a message box on your screen, and then the virus is disabled, or you can have a virus that deletes half of your hard drive. Computer viruses didn't really exist until the mid 1980s. The first computer viruses were created in university labs to demonstrate how much of a threat the vicious code could be. There are many kind of viruses that exist today. Some of the most common of Computer Viruses are: File Viruses, Boot Sector/Partition Viruses, Multi-Partite Viruses, Trojan Horses, File Overwriters, Polymorphic viruses, and Stealth Viruses. A File Virus is the most common kind of virus. These kinds of viruses usually infect .EXE and .COM files, which are the main component of a program or application. A file virus can insert its own code into part of the file, so that when the infected program file is run, the virus is ex
These viruses affect executable files, system files, applications, control panels, and HyperCard stacks. The virus was a Microsoft Word 97 macro virus. Because of this, someone can make a broad judgment of future virus development. The following are prefixes to some popular viruses types:WM: Word Macro virus that replicate under Word 6. More complex written viruses will cause more damage, spread easier, and are harder to be detected. Because these viruses are immediately sensed by the computer, they have a less chance to spread. Since the virus is run before the operating system, it is not MS-DOS-specific and can infect any PC operating system. They may also replicate under Word 97. These viruses stay in the RAM and infects every disk that is read by the computer until the computer is rebooted. Special encrypted code within this virus allows the virus to hide from detection. These viruses spread like a file virus, but still insert itself into a boot sector or partition table.
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