Third-party programs running in the background can interfere with the normal functioning of Blizzard games and may even prevent them from running at all. By temporarily disabling these programs from booting, they can be eliminated as the source of the problem. Follow the steps for your operating system below:
Tried everything here?
If you have tried all of the steps for your operating system and still require assistance, please visit our Technical Support Forum (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) or contact us.
Article ID: 200483