Information about this error when redeeming a key in your account
How to view and send the game key for a gift
Corrupted and damaged game files can create a wide variety of problems and errors.
How to receive technical support for Black Ops 4 disconnection errors
How to receive technical support for problems with your connection to Black Ops 4 servers
What to do if you can't claim your Call of Duty: Black Ops 4 key
Troubleshooting step for connection-related problems on Windows.
Out-of-date drivers and operating systems can cause a variety of issues, and are one of the first things to check when a game is having problems.
How to obtain error logs for Blizzard games
Instructions on getting Blizzard games to play on your TV.