Hi all, i was having problems with my airnav, ie slow, jumping, and eratic behaviour, i came on here and looked for solutions, and i found some , one of them being was, download airnav to its own file, which i did , aparently win 7 doesn't like airnav that much. But after doing so its brilliant, no more slow moving or strange behaviour, i would like to say a big thank you to all who helped me set up a perfect airnav system.