I have tried everything you can imagine. My Enduro 2 shows up as unknown usb device in the device manager, then if I uninstall it in the device manager, it re-installs it as a Garmin USB GPS. I can connect to my Xero without an issue, and I can connect the Enduro 2 to my phone, wifi, and to other computers. I have tried 4 different usb ports, 3 different USB cables, updated everything on the pc and the watch.