Follow these steps to resolve lockups or crashing issues.
Information regarding crashes accompanied by a Blue Screen
Troubleshooting for when an in-game shop screen is all black or blue
Troucleshooting steps for crash problems
Blizzard games run best on default settings and may not support all aspect ratios
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.
Troubleshooting for Battle.net desktop application crashes.
Information and troubleshooting on error BLZBNTBNA00000005
What to do if you cannot change the email or phone number that shows on the login screen because the field is greyed out