User manual

A V G Internet Security Business Edition 2012 © 2012 C opyright A V G Tec hnologies C Z, s.r.o. A ll rights reserved. 19 2
A specific low priority thread is used for each database, which guarantees other tasks (e.g. e-
mail messages storage in the Microsoft Exchange database) are always carried out
preferentially.
Proactive Scan (incoming messages)
You can enable or disable the proactive scanning function of VSAPI 2.0/2.5 here. This
scanning occurs when an item is delivered to a folder, but a request has not been made by a
client.
As soon as messages are submitted to the Exchange store, they enter the global scanning
queue as low priority (maximum of 30 items). They are scanned on the first in, first out (FIFO)
basis. If an item is accessed while still in the queue, it is changed to high priority.
Note: Overflow messages will continue to the store unscanned.
Note: Even if you disable both Background Scan and Proactive Scan options, the on access
scanner will be still active when an user will try to download a message with the MS Outlook client.
Scan RTF - you can specify here, whether the RTF file type should be scanned or not.
Number of Scanning Threads - the scanning process is threaded by default to increase the
overall scanning performance by a certain level of parallelism. You can change the threads
count here.
The default number of threads is computed as 2 times the ‘number_of_processors’ + 1.
The minimum number of threads is computed as ('number of processors'+1) divided by 2.
The maximum number of threads is computed as 'Number of Processors' multiplied by 5 + 1.
If the value is set to lower than the minimum value or to greater than the maximum value, the
default value is used.
Scan Timeout - the maximum continuous interval (in seconds) for one thread to access the
message that is being scanned (the default value is 180 seconds).
The Scanning properties section:
Use Heuristics - check this box to enable heuristic analysis method during scanning.
Report Potentially Unwanted Programs and Spyware threats - check this option to report
the presence of potentially unwanted programs and spyware.
Report enhanced set of Potentially Unwanted Programs - check to detect extended
package of spyware: programs that are perfectly ok and harmless when acquired from the
manufacturer directly, but can be misused for malicious purposes later, or programs that
always harmless but might be unwanted (various toolbars etc.). This is an additional measure
that increases your computer security and comfort even more, however it can possibly block
legal programs, and is therefore switched off by default. Note: This detection feature is
additional to the previous option, so if you want protection from the basic types of spyware,
always keep the previous box checked.