Troubleshooting for Blizzard Battle.net desktop app crashes.
Some overlay programs can cause Blizzard games to crash.
Information and troubleshooting on error BLZBNTBNA00000005
If you experience crashes, blue or black screens, performance issues, or your computer locks up while playing, follow the steps below to resolve these issues.
Follow these steps to resolve lockups or crashes in StarCraft II.
Information regarding crashes accompanied by a Blue Screen
How to obtain error logs for Blizzard games
Mac SC2 clients crash to desktop after each game.
Troubleshooting for game crashes with error "The application encountered an unexpected error"
Black Screen when starting StarCraft II.