With assistance of folks here I have Trojan Hunter up and running, and latest definitions. It doesn't find anyuthing, which is goods. But it gives one odd message, here: File scan While scanning E:\Reference Files\Computers\Aero Info, Up\New\SP0891.zip: File f:\temp\SP0891.EXE not found No trojan files found It is set up to scan zip files, and there are lots on my disk. It gives this message with only one of them Apparently it can't open the file -- but the named file is there, and I can open the zip and see it. But if Trojan Hunter can't open the zip file how does it know the name of the file that is zipped up in it, the file it can't find? Strikes me as odd, but maybe there is some simple explanation that escapes me.