After my 5th day using NOD32 and with help from the forum, you can now all consider me an expert ! ..he..he..he Unfortunately not quite there yet. Two questions:- 1. I think I saw a thread somewhere here describing the 'modus operandi' of higher efficiency mode (eg. packets checked in their entirety before downloading) vs. higher compatibility mode. Can't seem to find this again. Can someone enlighten me ? 2. In IMON HTTP, I have set 'Switch to passive mode for files larger than' to 1024kB and the time option to 24 seconds. Am on an unreliable 4MB developing country ADSL connection. (Speed varies - ave. about 2,5MB. Seems OK but any advice will be welcome ! My opening remark is of course a bad joke.