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We recommend that you regularly download updates from the Trend Micro update server to ensure continued protection. Trend Micro releases new virus pattern files several times each week. The scan engine files, on the other hand, are updated less frequently.
After downloading updates from the Trend Micro update server, you can designate a network drive to act as a download source (mirror) for other Information Servers on your network. This will avoid redundant downloads.
Downloading updates from a network drive is ideal for large networks (such as Intranets) with multiple Information Servers. Before attempting to download update files from another server, you must make sure the source server has the updated files.