"The Official Pattern Release or OPR is Trend Micro's latest compilation of patterns for identified viruses. It is guaranteed to have passed a series of critical tests to ensure that customers get optimum protection from the latest virus threats.

Editors Note: Most people do not need to download the latest definition files, but rather use your anti-virus programs auto updater to get daily updates as soon as they are available. This download is provided here in case you are having trouble with your auto update feature.
License: Freeware
Requires: Win All
Size: 14.3 MB "