If you recently installed an antivirus software solution on your computer, this can be the reason why your device isn't recognized and the program is telling you to check the firewall. If this is the case, open your antivirus and add the Card Watcher to the allowed list. If this isn't your case, you can try to go to Start > Control Panel > Programs and Features > select the Air Card Watcher and hit Repair. If you can't do this, simply uninstall it and then install it again. If you want to download the latest version of the software, visit the following download website.