Hi!

Yes, I use Garmin USB cable.
My OS is Windows 10.
No, I do not use USB hub, I connect device directly on motherboard.
My other Garmin nuvi devices can connect to PC without problems with same cable on same USB port.
Nuvi 2559 has LM by Western Europe. I need patch for nuvi 2559, because I need map of all Europe.
I have patched firmware, but I don't know how to install firmware without USB connections, only via SD card.