2011

One of the most insidious types of Trojan horse is a program that claims to rid
your computer of viruses but instead introduces viruses onto your computer.
The term comes from a story in Homer's Iliad, in which the Greeks give a giant
wooden horse to their foes, the Trojans, ostensibly as a peace offering. But
after the Trojans drag the horse inside their city walls, Greek soldiers sneak
out of the horse's hollow belly and open the city gates, allowing their compatriots
to pour in and capture Troy.
Update
A new version of a software or hardware product designed to replace an older
version of the same product. In addition, the installation routines for updates
often check to make sure that an older version is already installed on your
computer; if not, you cannot install the update.
Acronis Internet Security has it's own update module that allows you to manually
check for updates, or let it automatically update the product.
Virus
A program or piece of code that is loaded onto your computer without your
knowledge and runs against your will. Most viruses can also replicate
themselves. All computer viruses are manmade. A simple virus that can copy
itself over and over again is relatively easy to produce. Even such a simple
virus is dangerous because it will quickly use all available memory and bring
the system to a halt. An even more dangerous type of virus is one capable of
transmitting itself across networks and bypassing security systems.
Virus definition
The binary pattern of a virus, used by the antivirus program to detect and
eliminate the virus.
Worm
A program that propagates itself over a network, reproducing itself as it goes.
It cannot attach itself to other programs.
Glossary
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