Information about why you may not be able to post in the forums, and steps for how to fix it.
The Blizzard End User License Agreement explains what you may and may not do with a Blizzard account. This article highlights a few passages from the EULA that are most relevant to this policy.
Troubleshooting steps for performance problems
Troubleshooting steps for crash problems
A guide on running a traceroute on Windows and Mac.
Instructions for troubleshooting your network to allow Blizzard services to work properly.
The code of conduct for Blizzard Entertainment forums