Information about this error when adding a phone number or a Battle.net Authenticator to a Battle.net account.

What to do if you receive an error that your code is already claimed in your account.

Troubleshooting for game crashes with error "The application encountered an unexpected error"

What to do if you can't save your communication preferences in the Account Management page.

Troubleshooting steps for crash problems

What to do if you can't open the Battle.net desktop app, and there are no error messages when you try.

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.