LMI_at_work:
HiI believe you. But Windows 7 starter and Vista do any find any suitable drivers there. I'll try with an machine XP at home, it usually works. By the way, device manage says it is a Mega16U2. Should there be some Arduino specific bootloader in that USB cpu chip too?
I have Windows 7 Ultimate SP1 X64.
In my device manager it says under ports: Atmega 2560 (com7) ![]()
You could try and delete the device and start over again, but I doubt it would work.
Have a look at this : http://arduino.cc/forum/index.php/topic,118440.0.html It's an enhanced installing system which also install all the drivers you might need (want).
Works really well.
Hope this helps.