What to do if you can't open the Battle.net desktop app, and there are no error messages when you try.
Troubleshooting steps for "Waiting on Another Installation or Update" error when trying to update a game.
Troubleshooting steps for issues installing the PTR client
An error occurred while writing to your hard drive. Please make sure your hard drive is not full and try again.
An error occurred while writing to your hard drive. Please make sure your hard drive is not full and try again.
An error occurred while writing to your hard drive. Please make sure your hard drive is not full and try again.
An error occurred while writing to your hard drive. Please make sure your hard drive is not full and try again.
Explains the Real ID service, including limitations and how-tos.
Information about the Hearthstone achievement system