By storing the most time-sensitive virus information in the virus pattern file, Trend Micro is able to minimize the number of scan engine updates while at the same time keeping protection updated. Nevertheless, Trend Micro periodically makes new scan engine versions available. Trend Micro releases new engines under the following circumstances:
New scanning and detection technologies are incorporated into the software
A new, potentially harmful virus is discovered
Scanning performance is enhanced
Support is added for additional file formats, scripting languages, encoding, and/or compression formats
To view the version number for the most current version of the scan engine, visit the Trend Micro website(http://www.trendmicro.com).