Blizzard games run best on default settings and may not support all aspect ratios
How to resolve this problem when downloading an update
Troubleshooting steps for performance problems
Troubleshooting steps for connection problems
Troubleshooting steps for crash problems
Troubleshooting steps for performance-related problems.
There's a problem with the connection to the Blizzard servers.
Troubleshooting for installation-related problems on Mac.