From Trend Micro
# Virus Pattern Files / Cleanup Templates
The Virus pattern file protects customers against viruses.
The Virus cleanup template automatically removes the virus from the customer's system.
# Smart Scan Pattern Files
These patterns are used by Trend Micro products that include the Smart Scan feature. They include a smaller client-side pattern called the "Smart Scan Agent Pattern" that resides on the users local client workstation and also a "Smart Scan Pattern" that is hosted on a local server called the Smart Scan Server.
When a client is running in Smart Scan Mode, both the Smart Scan Agent Pattern and the Smart Scan Pattern will be accessed during the malware scanning process.
# Spyware Pattern Files / Cleanup Templates
The Spyware pattern file protects the customer from Spyware/Grayware threats.
The Spyware cleanup template automatically removes the Spyware/Grayware threat form the customer's system.
# Spyware Pattern Files for the new SSAPI Anti-Spyware Engine
These new Spyware pattern files together with the new Anti-Spyware Engine offer protection for Spyware/Grayware threats.
# Network Virus Pattern
The Network virus pattern offers protection against network viruses.
# Vulnerability Assessment (VA) Pattern
The VA pattern offers protection against software vulnerabilities.