The application was used to deliver information and notifications about products from AT&T. You can safely remove it from your computer, because the application is not available anymore, and there is no information about it. Try using Revo Uninstaller. Even, if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.