As you have discovered, setting Avast to scan inside archives and setting it to Thorough (sensitivity at high) allows Avast to detect 99% of all viruses.

NOW, if you also make sure that the Heuristic feature is selected for the respective On line Access Protection modules, and you have a nice secure setup.

ANY anti-virus software will overlook some viruses is its’ search engine sensitvity is lowered.

This “lowering” should only be used when a substantial number of “false positives” are registered, but only low enough to stop them.

Thank you for taking the time to share your test results with us.

:smiley: