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 step for connection-related problems on Windows.
Follow these steps to troubleshoot problems with your low-speed or wireless internet connection.
Information about troubleshooting problems with the Blizzard Battle.net friends list
How to enable maximum download rate
Troubleshooting steps for performance-related problems.
During technical troubleshooting, it is sometimes necessary to fully uninstall and reinstall a game.
Use the steps below to troubleshoot installation issues for Blizzard games.
Troubleshooting steps for disconnection problems with the Blizzard mobile app
Information on what to do when a game update is stuck at 0 B/Ss