Error code
Blizzard BLZBNTBNA00000005
BLIZZARDBLZBNTBNA00000005
Game/Platform Error· An error code shown by a game or gaming platform/launcher.
What it means
The Battle.net desktop app lost communication with the Battle.net Update Agent..
How to fix it
- Restart the Battle.net app and computer.
- Update drivers and operating system.
- Run a malware scan.
- Configure antivirus exceptions for Blizzard.
- Create a new Windows administrator account to test.
- Uninstall and reinstall the Battle.net app.
Not affiliated with Blizzard. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More Blizzard codes
- BLZ51903003The game client lost its connection to Blizzard servers with an "An error has occurred. Please try again later" message.
- BLZ51903021WoW displays "An Error has Occurred. Please Try Again Later" and the client cannot log in.
- BLZ51914003The WoW game client was immediately disconnected after attempting to connect to a realm.
- BLZ51934200World of Warcraft shows "There are currently no servers available" — common on patch days.
- BLZBNTAGT00000840Something went wrong with a game file and the update cannot proceed.
- BLZBNTAGT0000084BThe Battle.net Update Agent could not modify the necessary game files on disk.
- BLZBNTAGT000008A4The Battle.net desktop app is unable to download a file required for installation or patching.
- BLZBNTAGT000008FCThere is a conflict with one or more programs or services on the system.
- BLZBNTAGT00000960The Battle.net launcher failed to save or apply update files during patching.
- BLZBNTAGT00000BB8The Battle.net Update Agent failed to download or write new update data.
- BLZBNTAGT00000BCEA game patch failed because the downloaded patch data is corrupt or invalid.
- BLZBNTAGT00001389The Battle.net desktop app cannot download a file needed to install or update a game.