The
on-demand scanner hooks into the system at the lowest levels (File-System
Filter Driver), acts as part of the system (System Service), and delivers
notifications via the
VirusScan Enterprise
interface when detections occur.
This example describes when an on-demand scan is started and what
happens.
- The scanner determines if the memory, file, folder, or disk should
be scanned based on this criteria:
- The file’s extension matches the configuration.
- The file has not been cached.
- The file has not been excluded.
- The file has not been previously scanned.
- If the memory, file, folder, or disk meets the scanning criteria,
it is scanned by comparing the information in the file to the know virus
signatures in the currently loaded DAT files:
- If it is clean, the result is cached and the next item is
checked.
- If it contains a threat, the configured action is taken. For
example:
- If it needs to be cleaned, that process is determined by
the currently loaded DAT files.
- The results are recorded in the activity log if the scanner
was configured to do so.
- In the
On-Demand Scan Progress dialog, the
information describing the memory, file, folder, or disk name and the action
taken is displayed.
- If the memory, file, folder, or disk does not meet the scanning
requirements, it is not scanned. It is cached and the scanner continues until
all of the data is scanned.