Troubleshooting steps for latency problems in Diablo III
What to do if you internet service provider (ISP) is encountering connection issues.
A guide on running a traceroute on Windows and Mac.
Security software which can be used to resolve virus and malware infections.
How to run a pathping on Windows and Mac.
Instructions for troubleshooting your network to allow Blizzard services to work properly.
Information on various types of networks available to the public.
Instructions on how to use Looking Glass.
Troubleshooting steps for connection problems