did you update AVG? to latest version --do so and rerun do you still have ver 5.6? do you still have the original components -- re make the exe and retest seems strange that it " Ran one of the "infected files" on Virustotal and about 3 or 4 picked up the presence of the Trojan; most recorded nothing. What does this mean?" infected files -- what files - the exe's separate the ones that are saying ok from the rest onto different folders your statements are not making sense to me if you could supply screenshots of the affect files it may help ken