The Battle net error BLZBNTBNU00000006 occurs when the application being installed has already been uninstalled. When you launch the app and the blue button says ...

There are many reasons why you are getting the “Could not log in to Battle.net” message with error code BLZBNTBNA00000A8D, BLZBNTBNA00000A8E, or BLZBNTBNA00000A8F ...