There's a problem with the connection to the Blizzard servers.
Troubleshooting for installation-related problems on Mac.
What to do if you have trouble with the captcha
Information on Unable to Locate Component error.
Troubleshooting problems with the Battle.net friends list
How to solve this problem on an incomplete Battle.net account
Troubleshooting step for connection-related problems on Windows.
A guide for diagnosing and repairing problems with physical hard drives.
Follow these steps to troubleshoot problems with your low-speed or wireless internet connection.