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

The Public Test Realm/Region (PTR) is a special service you can use to test patches before we release them to the public.

This error occurs when your connection to our servers is blocked. This may be caused by a third-party program.

Information on the Blizzard Voice Chat feature.

Details of classic games patches, where to download them, and how to install the latest updates for classic games.

You can transfer your original Diablo® III Console game save into Ultimate Evil Edition™ so you don't lost any of your progress by upgrading

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

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This error happens when the game cannot read or modify important game files.

Information on error BLZBNTBGS0000003C