Information regarding managing an Authenticator and the migration of the Battle.net Authenticator to the Battle.net Mobile App

Troubleshooting for Battle.net desktop app crashes.

An error occurred while writing to your hard drive. Please make sure your hard drive is not full and try again.

What to do if you can't open the Battle.net desktop app, and there are no error messages when you try.

Troubleshooting steps for issues installing the PTR client

If you have issues with the sound in your game, such as skipping, popping, screeching, or no sounds at all, follow the steps below to troubleshoot the problem.

Instructions for reducing the installation size of Call of Duty or removing unwanted Game Modes.

Instructions for reducing the installation size of Call of Duty or removing unwanted Game Modes.

Explains the Real ID service, including limitations and how-tos.

Failed to launch a critical file. Please close all other applications, temporarily deactivate your anti-virus software, and try again. Alternatively, log in as an administrator and try again.