Scan of compound files
A common method of concealing viruses is to embed them into compound files: archives, databases, etc. To detect viruses that are hidden in this way a compound file should be unpacked, which can significantly lower the scan speed.
For each type of compound file, you can select to scan either all files or only new ones. To make your selection, click the link next to the name of the object. It changes its value when you left-click on it. If you select the scan new and changed files only mode, you will not be able to select the links allowing you to scan all or new only files.
By default, Kaspersky Internet Security scans only embedded OLE objects.
When large compound files are scanned, their preliminary unpacking may take a long period of time. This period can be reduced by enabling unpacking of compound files in background mode if they exceed the specified file size. If a malicious object is detected while working with such a file, the application will notify you about it.
You can restrict the maximum size of the compound file being scanned. Compound files larger than the specified value will not be scanned.
When large files are extracted from archives, they will be scanned even if the Do not unpack large compound files box is checked.
To modify the list of scanned compound files:
In order to set the maximum size of compound files to be scanned:
To unpack large-sized compound files in background mode: