If your navigation device shows as not connected, check the connection between your navigation
device and your computer. more
Windows
Mac OS X
Reset your navigation device and make sure that your device is switched on before you
connect it to the computer.
[ show me how... ]
Connect your navigation device to a different USB port on your computer.
You should plug the USB connector directly into a USB port on your computer and not
into a USB hub or USB port on a keyboard or monitor.
We recommend that you always use the original USB cable provided with your device,
however, in rare cases the USB cable may have developed a fault. To test this, try
connecting your device using a different USB cable.
Make sure you are logged in as an 'Administrator' to ensure that you have sufficient rights
to connect new hardware to your computer.
Make sure you have the latest Service Pack for Windows installed.