Hi @justb - Not all anti virus programs will pick up all dangers... some will detect dangers that others miss and vice versa. All I can say is that my set up is not detecting anything.
In the end, we all have to take judgment about the safety of software we're downloading and using. Some of the software comes via so many other places that we can't be sure of the source and, I guess there is the capacity for nasties to find their way into it.
Something we can do to safeguard ourselves (against obvious nasties) is maintain a regular backup regime of our computers so that, if things go wrong, we've got a 'clean' backup to revert to. What's harder to guard against is the insidious malware that operates in the background... if that goes undetected we end up backing that up as well!
Regards
Excel