The Trend Micro scan engine uses an
external data file, called the virus pattern file, to keep current with the latest
viruses and
other Internet threats such as Trojan horses, mass mailers, worms, and mixed attacks
(for
example, Bagle or NetSky).
All Trend Micro antivirus programs
using the ActiveUpdate function can detect the availability of a new virus pattern
on the Trend Micro server, and/or you can set it to
automatically poll the server every week, day, or hour to get the latest file. Trend Micro recommends that you schedule automatic
updates at least daily, which is the default setting for PortalProtect. Whether performed in the background or on-demand, the pattern file
updates without interrupting users or network traffic.
You can manually download virus pattern files from the following Web site, where you
can also
find the current version, release date, and a list of all the new viruses definitions
included in
the file.