Right guys. Weekend away. I have removed the software to start again to see if I can get this correct. Just a few points. Firstly the USB is fine - it plugs & plays with other PC's without problem. (XP on those PC's)
I am using Vista home edition with service pack 1 - it is 32-bit.
The processor is AMD Sempron (but only 2.21Ghz)
Now what I plan to do is to start again from scratch downloading from here
http://www.airnavsystems.com/RadarBox/support.html Two questions. Firstly should I download the full version download link?
Secondly, will I be prompted to load the drivers there and then?
Finally, if the software is to be loaded prior to the airnav box itself, why does the instruction on the above link advise adding the hardware first?
Apologies for taking up so much time. I will hang fire for the time being just to confirm this is what I need to be doing and will not start until I hear from someone.