Failed to create a required file. Please make sure you are running this program as an administrator and try again.

Information on error BLZBNTBNU00001

Information on error BLZBNTBNU00002

This error occurs when your connection to our servers is blocked. This may be caused by a third-party program.

This article explains the process of creating system files

Failed to download a required update. Please check your internet connection and try again.

Troubleshooting steps to resolve this error

Information on error BLZBNTBGS8000000B

The Battle.net desktop app is trying to connect to an invalid or nonexistent server.

Information on error BLZAPPBTS0000F