I really appreciate what you guys are saying. I'm still no further forward. I've uninstalled, re-installed, used the links on this site, tried the bittorrent, ran around the block a few times, kicked the cat (sorry pet lovers) I don't have a cat. I've scanned my system several times both with Avira and HitmanPro, root kit or something like that etc etc. and nothing is detected But when I re-download and install both DCS World and the A10 module, I get exactly the same notification of this Trojan. Geez what next. I'm really missing out on a great product. I take the point about Avira and dll files which has been made, I have had over sensitivity before with this anti virus. I can't remember off hand who raised the dll issue but I assume when you ignored the warning your computer hasn't died since? Even for free stuff, I always do a virus scan before opening anything, in fact I do it with everything. For all its faults Avira does do a pretty in depth scan.