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

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

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.

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.

How to obtain error logs for Blizzard games

Information about why you may not be able to post in the forums, and steps for how to fix it.

How to read and analyze Pingplotter data in order to track down a potential connection issue.

How to read and analyze WinMTR data in order to track down a potential connection issue.