Troubleshooting steps to resolve this error
Use the steps below to troubleshoot installation issues for Blizzard games.
Troubleshooting the Diablo II (2000) installer.
This error occurs when you have connected to our patch server but you cannot download patch information.
Information on error BLZBNTBNA00000065
Information on error BLZBNTBNA00000066
Information on error BLZBNTBNA00000067
Cannot install or patch Call of Duty: Modern Warfare
Cannot install or Patch Call of Duty: Black Ops 4
This error means Battle.net Agent (the process that installs and patches our games) couldn't stream necessary files.