OfficeScan 10 Administrator's Guide - Online Help Home - Trend Micro

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Trend Micro OfficeScan 10 Service Pack 1 Administrator’s Guide 5-26 Files to Scan Select from the following options: • All scannable files: Scan all files • File types scanned by IntelliScan: Only scan files known to potentially harbor malicious code, including files disguised by a harmless extension name. See IntelliScan on page A-4 for details. • Files with certain extensions: Only scan files whose extensions are included in the file extension list. Add new extensions or remove any of the existing extensions. Scan Settings Select one or more of the following options: • Scan network drive: Scans network drives or folders mapped to the client computer during Manual Scan or Real-time Scan • Scan hidden folders: Allows OfficeScan to detect and then scan hidden folders on the computer during Manual Scan • Scan compressed files: Allows OfficeScan to scan up to a specified number of compression layers and skip scanning any excess layers. For example, if the maximum is two layers and a compressed file to be scanned has six layers, OfficeScan scans two layers and skips the remaining four. Note: OfficeScan treats Microsoft Office 2007 files in Office Open XML format as compressed files. Office Open XML, the file format for Office 2007 applications, uses ZIP compression technologies. If you want files created using these applications to be scanned for viruses/malware, you need to enable scanning of compressed files. • Scan floppy disk during system shutdown: Scans any floppy disk for boot viruses before shutting down the computer. This prevents any virus/malware from executing when a user reboots the computer from the disk. • Enable IntelliTrap: Detects and removes virus/malware on compressed executable files. See IntelliTrap on page A-5 for details. • Scan boot area: Scans the boot sector of the client computer’s hard disk for virus/malware during Manual Scan, Scheduled Scan and Scan Now
Protecting Computers from Security Risks CPU Usage OfficeScan can pause after scanning one file and before scanning the next file. This setting is used during Manual Scan, Scheduled Scan, and Scan Now. Select from the following options: • High: No pausing between scans • Medium: Pause between file scans if CPU consumption is higher than 50%, and do not pause if 50% or lower • Low: Pause between file scans if CPU consumption is higher than 20%, and do not pause if 20% or lower If you choose Medium or Low, when scanning is launched and CPU consumption is within the threshold (50% or 20%), OfficeScan will not pause between scans, resulting in faster scanning time. OfficeScan uses more CPU resource in the process but because CPU consumption is optimal, computer performance is not drastically affected. When CPU consumption begins to exceed the threshold, OfficeScan pauses to reduce CPU usage, and stops pausing when consumption is within the threshold again. If you choose High, OfficeScan does not check the actual CPU consumption and scans files without pausing. Schedule Configure how often and what time Scheduled Scan will run. Select from the following options and then select the start time: • Daily • Weekly • Monthly Scan Exclusions Configure scan exclusions to increase the scanning performance and skip scanning files causing false alarms. When a particular scan type runs, OfficeScan checks the scan exclusion list to determine which files on the computer will be excluded from both virus/malware and spyware/grayware scanning. 5-27
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