Garmin express is not working is a common problem that can happen due unstable internet connection or outdated Garmin express software. Insufficient system memory may cause not responding problem. Make sure Garmin express is not blocked by Windows and security software’s. To fix out Garmin express not working problem, try latest version of Garmin Express. Reboot your windows/ Mac OS. If nothing works, reinstall Garmin express software to fix not working issue.