Cannot install or patch Call of Duty: Modern Warfare
The Public Test Realm/Region (PTR) is a special service you can use to test patches before we release them to the public.
Instructions for troubleshooting your network to allow Blizzard services to work properly.
Information about the global play feature of Blizzard games.
How to read and analyze WinMTR data in order to track down a potential connection issue.
How to run a pathping on Windows and Mac.
A guide on running a traceroute on Windows and Mac.
Information on the Blizzard Voice Chat feature
This error occurs when you have connected to our patch server but you cannot download patch information.
Troubleshooting steps to resolve this error