A common technique for concealing viruses and other malware is to embed them in compound files such as archives or email databases. To detect viruses and other malware that are hidden in this way, the compound file must be unpacked, which may slow down scanning. You can limit the set of compound files to be scanned, thus speeding up scanning.
The method used to process an infected compound file (disinfection or deletion) depends on the type of file.
File Anti-Virus disinfects compound files in the RAR, ARJ, ZIP, CAB, and LHA formats and deletes files in all other formats (except mail databases).
To configure scanning of compound files:
In the right part of the window, the settings of the File Anti-Virus component are displayed.
The File Anti-Virus window opens.
File Anti-Virus will scan only new and changed compound files of all types.
The Compound files window opens.
A file is considered large if its size exceeds the value in the Maximum file size field.
File Anti-Virus scans large-sized files that are extracted from archives, regardless of whether or not the Do not unpack large compound files check box is selected.