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.
Troubleshooting steps for connection problems
Troubleshooting step for connection-related problems on Windows.
Information on moving Blizzard games to a different hard drive
Follow these steps to troubleshoot problems with your low-speed or wireless internet connection.
How to change the language settings in your Blizzard games
How to reset in-game options
This article explains the process of speaking to a customer support representative.
Information on how setting Appear Offline in the friend's list affects visibility in Blizzard Games.
Information on the Blizzard Authenticator