How to resolve this error in Hearthstone

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Troubleshooting steps for this connection error in SC2 or HOTS

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Information on Unable to Locate Component error.

This article covers unexpected Blizzard Update Agent errors.

We're having trouble starting the Battle.net desktop app. Please try again. If the problem persists, try restarting your computer.

This error occurs when you have connected to our patch server but you cannot download patch information.

Information on error BLZBNTBNA000003E8

Information on error BLZBNTBNA000007D0