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Cleaning compressed mail attachments
Cleaning compressed files attached to an email message involves decompressing the compressed file, cleaning the contents, and then recompressing the file. For example, if there are five files, A.doc, B.doc, C.doc, D.doc, and E.doc: C.doc is infected with a macro virus, and they are all packed into a single compressed file called docs.zip: [docs.zip(A.doc, B.doc, C.doc, D.doc, E.doc)]. You can set Trend Micro PC-cillin Internet Security to detect the virus in C.doc, issue an alert, and write the event to the Virus log.
If you have selected the Clean viruses in compressed files check box, because C.doc is in the first layer, Trend Micro PC-cillin Internet Security will automatically execute the Clean action when Internet Security detects a virus up to the second layer.
Important: PC-cillin Internet Security is able to carry out this Clean scan action only if the infected file is contained in the first layer [docs (A.doc, B.doc, C.doc, D.doc, E.doc)] of the compressed file.
However, suppose C.doc was located in a deeper layer of compression, for example, (docs +2.zip{docs+1.zip[docs.zip(A.doc, B.doc, C.doc, D.doc, E.doc)]}). Although PC-cillin Internet Security could detect the virus, it is unable to perform any scan action. Therefore, if you want to clean C.doc, use WinZip, or another compression program to decompress the compressed file. When the individual files have been decompressed, right-click C.doc and click Trend Micro PC-cillin Internet Security. Trend Micro PC-cillin Internet Security will perform the scan action you have specified.
To clean a compressed mail attachment:
On the PC-cillin Internet Security main window, click Email > Mail Scan (or Webmail Scan).
Under Scan actions, make sure Clean is selected from the Action when virus found list, and then select the Clean viruses in compressed files check box.
Click Apply.
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