Product manual

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:
1 Run on its own, without you having to take any
action
1 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 360 attempts to remove
all viruses from your PC.
Viruses fall into the following recognized categories:
These viruses infect program
files. When infected files run,
they can attach the viruses
that they carry to other
program files. Norton 360
scans all program files on
your PC to find and eliminate
file infectors.
File infectors
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
360 scans the system areas
of your PC to find and remove
boot viruses.
Boot viruses
241Understanding alerts and messages
Types of viruses