BLZBNTBGS8000000E

Try the following steps to resolve the error.

1. If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
2. Configure your security software's exception list to allow Blizzard applications to run.
3. Close all other applications to resolve software conflicts and free up resources.
4. Update your drivers and operating system to resolve any compatibility issues.
5. Repair Disk Permissions to resolve any permission conflicts with logon modules.
6. Deleting the Battle.net cache folder can resolve problems with the logon module.