Updated: 4 months ago
Article ID: 99037
Before trying any of the following steps check the BlizzardCS Twitter for any service interruptions.
Follow the steps below to troubleshoot latency or disconnection problems. Select your game from the dropdown at the bottom for game-specific troubleshooting.
- Windows
- Mac
- Reset your network devices to make sure your router hasn't become flooded with data.
- If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
- Update your drivers and operating system to resolve any compatibility issues.
- Release and renew your IP and flush your DNS to resolve any network conflicts.
- Close all other applications to resolve software conflicts and free up resources.
Advanced Troubleshooting
- Check your network configuration to find any issues with your firewall, router, or port settings.
- Disable any proxies that may interfere with the login module.
- Update or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
- Reset your network devices to make sure your router hasn't become flooded with data.
- Run Software Update to check for pending updates to software, drivers, and firmware.
- If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
- Release and renew your IP and flush your DNS to resolve any network conflicts.
- Close all other applications to resolve software conflicts and free up resources.
Advanced Troubleshooting
- Repair Disk Permissions to resolve any permission conflicts with logon modules.
- Check your network configuration to find any issues with your firewall, router, or port settings.
- Disable any proxies that may interfere with the login module.
- Update or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
- Select a game
- World of Warcraft
- StarCraft II
- Heroes of the Storm
- Hearthstone
- Overwatch
- Check the Realm Status page to see if your realm is up.
- Reset your user interface to make sure your files and addons are not corrupted.
- Check your in-game network optimization settings:
- Go to the in-game Network menu (ESC > System > Network).
- Check the Optimize Network for Speed option if you're using a high-speed internet connection.
- Uncheck the Optimize Network for Speed option if you're using a low-speed internet connection.
Tried everything here?
If you have tried these steps and still require assistance, please visit our Technical Support Forums or contact us.
- Delete the Cache Folder if you're having problems downloading custom maps.
Tried everything here?
If you have tried these steps and still require assistance, please visit our Technical Support Forums or contact us.
- Deleting the Cache Folder can resolve some login issues.
Tried everything here?
If you have tried these steps and still require assistance, please visit our Technical Support Forums (StarCraft II) (Heroes of the Storm) or contact us.
- If you're having problems on a mobile device, check our Troubleshooting Hearthstone on Mobile Devices article.
Tried everything here?
If you have tried these steps and still require assistance, please visit our Technical Support Forum or contact us.
- Visit our Overwatch Network Problems article for network diagnostic information.
Tried everything here?
If you have tried these steps and still require assistance, please visit our Technical Support Forums or contact us.
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