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.
BitDefender 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 dan-
gerous 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.
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