I have a nuvi 1450. Ran just fine connecting to my Windows box under 7 and 8.1. when I went to Windows 10, that is where the problems start.
Since the first install of Windows 10, I experience these problems:
1. Upon starting Garmin Express, it takes a long time for it to see the Nuvi, if at all.
2. It takes forever for the Nuvi to switch into being connected to the computer vs. stand alone.
3. When it does see it, and connects, it does work for a while then it locks up my computer. The only fix is to unplug the Nuvi and reboot.
I am running the latest Garmin Express. Windows, now, is build 1511 10586.3 PRO x64.
My computer is home built with a ASUS M5a78l-m usb3 MOBO with an AMD FX 8300 8 core, 3.3 GHZ processor with 8GB ram.
TIA
Bill