Comprehensive troubleshooting for any technical issue you encounter that does not have its own support article

Troubleshooting steps for performance problems

Troubleshooting steps for performance-related problems.

Information about what to do if you are experiencing reduced performance on the Beta version of the Battle.net Desktop App

Troubleshooting performance problems in Modern Warfare II.

We have detected that your video driver may be out of date which may cause performance issues when playing [game_name].

How to resolve issues with slow patch downloads.

Information on error message BLZBNTBGS8000001C.

Troubleshooting steps for communication and transmission errors.

How to resolve this error in Diablo II