Troubleshooting steps for latency problems in StarCraft II

What to do if you experience high latency or frequent disconnects.

Troubleshooting performance problems in Modern Warfare II.

Information on various types of networks available to the public.

Troubleshooting steps for connection problems

What to do if you internet service provider (ISP) is encountering connection issues.

Troubleshooting steps to help you connect to StarCraft II

Comprehensive troubleshooting for any technical issue you encounter that does not have its own support article

We can't connect you to the Blizzard patch service. Please check your internet connection and try again.

Information as to why a mystery Battle.net account is already connected to your Xbox account