When I download software or files the Downloads window opens, the file downloads and is virus scanned and then a message appears telling me:

"Download Statusbar: Anti-Virus Scan failed to start, check configuration"

I had an options facility when I first set up Firefox where there were several options available - I believe the virus check facility was the last tab.

I think I had an option box which allowed me to tick a check box to scan on download but I can no longer find this option box. Please can you advise the route to it?

Many thanks in anticipation.