We will periodically update this message with the latest virus update information. If you are running virus scan 5.0 or higher, you can now upgrade to 5.15. If you are not running virus scan 5.0 DO NOT run this upgrade. A computer virus is a program designed to spread itself by first infecting executable files or the system areas of hard and floppy disks and then making copies of itself.
Viruses usually operate without the knowledge or desire of the computer user.
For example, some viruses infect executable code in the boot sector of a floppy disk or in system areas of hard drives. Another type of virus, know as a macro virus , can infect word processing and spreadsheet documents that use macros. And it's possible for HTML documents containing JavaScript or other types of executable code to spread to viruses or other malicious code. Since virus code must be executed to have any effect, files that the computer treats as pure data are safe. This includes graphics and sound files such as .gif, .jpg, .mp3, .wav, and so on, as well as plain .txt files.