Approach to follow in my view:
-Plug the GPS with the usb cable to the PC for 5 minutes to recharge a bit (and the computer recognizes the métariel) and then unplug the usb cable. (You can not turn on the GPS when connected)
-Download And install the Garmin Express software and not do the software update (in parameter: the latest version of Garmin Express 03.07.2015 is buggy)
-The Launched software, reconnect the USB cable to the GPS, the software detects the automitiquement. Save GPS and register with their email ...
-Make The updates of GPS, about 3:30 to 750ko / s (do not worry about space as a space of memory and dedicated exclusively to the updates the cards.
-Débrancher And light GPS (test it outside)
-Create A personal space on the Garmin website
-Re-Download the complete map on the computer to use the Garmin BaseCamp software and other software ...
Good road: p