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To ensure that your network is constantly protected against the latest malware, update IMSS components on a regular basis. You can choose to perform manual or scheduled updates.
The following table provides a list of all IMSS components.

IMSS Components

Component
Description
Virus Scan Engine
The Virus Scan Engine detects Internet worms, mass-mailers, Trojans, phishing sites, spyware, network exploits and viruses in messages and attachments.
Advanced Threat Scan Engine
The Advanced Threat Scan Engine (ATSE) uses a combination of pattern-based scanning and heuristic scanning to detect document exploits and other threats used in targeted attacks.
Virus Pattern
The Virus Pattern contains information that helps IMSS identify the latest viruses/malware and mixed attacks.
Spyware Pattern
The Spyware Pattern identifies spyware/grayware in messages and attachments.
IntelliTrap Pattern
The IntelliTrap Pattern detects real-time compression files packed as executable files.
IntelliTrap Exception Pattern
The IntelliTrap Exceptions Pattern contains a list of "approved" compression files.
Antispam Engine
The Antispam Engine detects spam in messages and attachments.
Antispam Pattern
The Antispam Pattern helps IMSS identify the latest spam in messages and attachments.
URL Filtering Engine
The URL Filtering Engine facilitates communication between IMSS and the Trend Micro URL Filtering Service. The URL Filtering Service is a system that rates URLs and provides rating information to IMSS.
Smart Scan Agent Pattern
The Smart Scan Agent Pattern contains pattern definitions used by IMSS when in Smart Scan mode. IMSS downloads this pattern from the update source using the same methods for downloading other components.