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