The Blizzard Launcher cannot download new patch data from our servers. This is usually caused by an unstable internet connection or a third-party program that is blocking access. Follow the steps below to resolve the issue.
Tried everything here?
If you have tried all of the steps for your operating system and still require assistance, visit our Technical Support Forum (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) or contact us.
Article ID: 494