The "Log In" button will not light until complete login information is entered.

Receiving an error with 0xc0000005 in it when attempting to launch the Blizzard App or load a game.

What to do if you are redirected to localhost after linking a third-party account

We're having trouble starting the Battle.net desktop app. Please try again. If the problem persists, try restarting your computer.

Troubleshooting the message "Processing, please wait" when making Immortal purchases on a mobile device.

How to resolve this error when attempting to set up the authenticator in the Battle.net mobile app

The client you are using to log in to the game is out of date or there is a mismatch between the client and server versions

Instructions for installing Call of Duty: Modern Warfare III

What to do if your game doesn't launch after clicking Play.

Can't log into Battle.net website or get online when logging with the Battle.net desktop app.