The smart manager of Samsung a8 cannot be found after upgrading to Android 6.0.1, and there is no way to clean up the background. How

1. Restart the computer. 2. Uninstall the recently installed third-party software and observe to initially rule out whether it is a software conflict, such as mobile phone manager, games and other software. 3. Back up mobile phone data (phone book, text messages, multimedia files, etc.) and restore factory settings. If the problem of restoring factory settings still persists, it is recommended to send the NOTE5 phone to the nearest Samsung service center for testing and further processing.