Information about this error when redeeming a key in your account
Troubleshooting steps for disconnections in StarCraft II
Corrupted and damaged game files can create a wide variety of problems and errors.
Troubleshooting step for connection-related problems on Windows.
Out-of-date drivers and operating systems can cause a variety of issues, and are one of the first things to check when a game is having problems.
How to obtain error logs for Blizzard games
Instructions on getting Blizzard games to play on your TV.
What to do if any settings you change do not save
How to install a Blizzard game you already own on a different computer
Troubleshooting steps for connection problems