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#11
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trying the nano on another box good root-cause step.
If it works.. I have a simple question. Have you REMOVED power to the laptop and drained it, then tried?
usb ports can and do get hung in an unusable state.
failing that, uninstall in device manager AND remove driver. reboot with no network connection, check to see if it installs a driver again, remove it again and delete driver files until it fails to install. then put on the wired connection and reboot or 'search for driver automatically'.