StarCraft® II Connection Troubleshooting

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If you are experiencing high latency, frequent disconnects, or cannot connect to StarCraft® II, please follow the steps below to resolve the issue.

Windows

  1. Outdated operating systems may contribute to connection issues. Update Windows.
  2. You must have a stable internet connection to play the game. Try optimizing your internet connection.
  3. Programs running in the background can take system resources that the game requires to run. Close any open background applications.
  4. Outdated drivers can affect connection stability. Make sure your computer's drivers are up-to-date.
Advanced Troubleshooting
  1. Security software may interfere with your game's connection to the internet. Try disabling or temporarily uninstalling your security applications.
  2. Incorrect DNS (domain name system) configurations may cause high latency or disconnections for all internet connections on your computer. Try flushing the DNS.
  3. Issues with your network card, the hardware that handles your computer's network connection, may cause connectivity issues. Try troubleshooting your network card.
  4. Check your network configuration to find any issues with your firewall, proxy, router, or port settings.

Mac

  1. Outdated software may contribute to connection issues. Run Software Update.
  2. You must have a stable internet connection to play the game. Try optimizing your internet connection.
  3. Programs running in the background can take system resources that the game requires to run. Close any open background applications.
Advanced Troubleshooting
  1. Security software may interfere with your game's connection to the internet. Try disabling or temporarily uninstalling your security applications.
  2. Incorrect DNS (domain name system) configurations may cause high latency or disconnections for all internet connections on your computer. Try flushing the DNS.
  3. Check your network configuration to find any issues with your firewall, proxy, router, or port settings.
  4. Changes to your Mac's permissions may prevent the game from running properly. Repair your disk permissions.

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 or contact us.

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