Common Problems
This error occurs when you have connected to our patch server but you cannot download patch information. Follow the steps below to resolve the issue.
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Update your drivers to resolve any compatibility issues.
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Try closing background applications to resolve any software conflicts.
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Run the Battle.net desktop app in Administrator Mode to address many installation, patching, networking, and start-up errors.
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Disable or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
Advanced Troubleshooting
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If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
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Check your network configuration to find any issues with your firewall, router, or port settings.
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Disable any proxies that may interfere with the login module.
Tried everything here?
If the steps above did not resolve your problem, visit our Technical Support forum or contact us.
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