All parameters for avast! antivirus can be set in Administration center (Settings). The virus scan tests the whole files, and the content of archives (compressed files). Net.purum can disable partial file download, because download accelerators can cancel correct virus scan.
Antivirus protection
Certain downloaded files will be tested by the antivirus; the selection of those files depends on the file type. Net.purum uses avast! antivirus from ALWIL Software.