Corrupted and damaged game files can create a wide variety of problems and errors.
Information about this error when redeeming a key in your account
How to view and send the game key for a gift
Information about the global play feature of Blizzard games.
Troubleshooting steps for IGR owners who have partnership with Blizzard on commonly encountered issues.
Information and troubleshooting on error BLZBNTBNA00000005
How to change the language settings in your Blizzard games
Troubleshooting for problems installing or patching the Starcraft II game client
How to reset in-game options
Battle.net is unable to find your game installation in the directory selected.