Types of viruses

A virus is a small program that is designed to alter the way your PC operates, without your knowledge or permission.

To be a virus, a program must do the following:

  • Run on its own, without you having to take any action

  • Make copies of itself so that it can spread to other PCs

Although not all viruses are intended to cause damage, even harmless viruses can affect the performance and stability of your PC. Norton attempts to remove all viruses from your PC.

Viruses fall into the following recognized categories:

File infectors

These viruses infect program files. When infected files run, they can attach the viruses that they carry to other program files. Norton scans all program files on your PC to find and eliminate file infectors.

Boot viruses

These viruses attach themselves to the system areas of your PC and become active as soon as your PC starts. They can attach themselves to disks or other storage devices that is connected to your PC. Norton scans the system areas of your PC to find and remove boot viruses.

Multipartite viruses

These viruses use the techniques of both boot and file infector viruses. Norton scans for such viruses and eliminates them.

Macro viruses

These viruses attach themselves to the data files that contain executable components, such as some spreadsheet, presentation, and word-processing files. These viruses that are spread when a program runs the executable portion of a data file. Norton scans data files for macro viruses and removes them.

Norton scans your PC for both known viruses and unknown viruses.

Known viruses are automatically detected and repaired. Unknown viruses are detected by analyzing each executable file for various characteristics common to viruses. In addition, Norton automatically updates itself over the Internet to expand and refine its list of known viruses.

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DOCID: v6958021_ns_retail_en_us
Operating System: Windows
Last modified: 12/13/2016