This article covers unexpected Blizzard Update Agent errors.

We're having trouble starting the Battle.net desktop app. Please try again. If the problem persists, try restarting your computer.

Performing a scan of your computer's physical memory can help identify possible errors.

This error occurs when you have connected to our patch server but you cannot download patch information.

Information on error BLZBNTBNA000003E8

Information on error BLZBNTBNA000007D0

Information on error BLZHSBGS00000056

Information on error BLZBNTBGS00000056

Troubleshooting steps for disconnection problems with the Battle.net mobile app

This error means Battle.net Agent (the process that installs and patches our games) couldn't stream necessary files.