Following the following steps to update your Garmin Express software: Attach your Garmin GPS device to the computer using the USB cable. Now, open Garmin Express software. If you see a message regarding the update, that means you are using a version that is bound to create problems. You are advised to install the latest Garmin map update by following the on-screen instruction to complete the update process. Now, once the update is complete, you can detach the Garmin device from your computer. After restarting the device, you are all set to use it.