Troubleshooting steps to help you connect to the Battle.net desktop app.

Information on troubleshooting connection and installation issues using another network.

Use the steps below to troubleshoot installation issues for Blizzard games.

What to do if you are unable to install or patch Diablo III

What to do if you can't resync your authenticator.

This error occurs when you have connected to our patch server but you cannot download patch information.

Failed to download a required update. Please check your internet connection and try again.

How to read and analyze Pingplotter data in order to track down a potential connection issue.

Failed to download a required update. Please check your internet connection and try again.

How to read and analyze WinMTR data in order to track down a potential connection issue.