I appreciate your leading me by the hand on this. Thanks to Technical, I checked out my DAP and found I had a very old version. After downloading the current version, I followed the directions to set it up for virus scan. At one point, however, there is a rectangular box labeled "Anti-Virus Executable." You are supposed to click the "Browse" button to find your anti-virus program and get it into that rectangular box. I did so and got Alwil Software, which I opened, and I got Avast4, which I opened. That brought up a bunch of folders and other Avast things that mystify me. There's another box labeled "Open." I don't know what to do next. Can you help? Or is the something I just type into that rectangular box labeled Anti-Virus Executable to get Avast in there?