Troubleshooting steps for performance-related problems.
There's a problem with the connection to the Blizzard servers.
Troubleshooting for installation-related problems on Mac.
What to do if you have trouble with the captcha
Information on Unable to Locate Component error.
What to do if you have a lower rank or reward from the previous season in Call of Duty.
Troubleshooting problems with the Battle.net friends list
How to solve this problem on an incomplete Battle.net account
Troubleshooting step for connection-related problems on Windows.