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.

This pattern file is most effective when used with the latest scan engine. We strongly encourage you to update your scan engine to ensure you are using the best virus protection available. For latest viruses added, please read the whatsnew.txt file.