Battle.net Error # 101

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Battle.net Error # 101 Unable to connect. Please try again later. If the problem persists, please contact technical support.

If you get Error # 101, or if you are sent back to the launcher after you click Play, there may be an issue with the connection between your computer and our servers. Follow the steps below to resolve the issue.

Windows

  1. Visit the Realm Status page and the Service Status Forum to check game server status. If the servers aren't available, try connecting again later.
  2. Over time, your router may become flooded with data and drop your connection to your ISP. Reset your network devices to address this.
  3. Conflicting network information will cause update issues. Try to release and renew your IP and flush your DNS to resolve any conflicts.
  4. Restart the Battle.net client to check for updates.
  5. Our games require an up-to-date operating system in order to run properly. Run Windows Update to be sure you're using the most recent version.
  6. The game requires up-to-date drivers to run smoothly. Update your drivers regularly.

Advanced Troubleshooting
  1. Configure your network to make sure your connection is not being blocked by a firewall or router.
  2. Reset your UI to make sure your User Interface files are not corrupted.
  3. Programs running in the background can interfere with the game. Close any running background applications.
  4. Running a Trace Route can help identify where the connection problems are occurring if the solutions above did not resolve the issue.

Mac

  1. Visit the Realm Status page and the Service Status Forum to check game server status. If the servers aren't available, try connecting again later.
  2. Over time, your router may become flooded with data and drop your connection to your ISP. Reset your network devices to address this.
  3. Conflicting network information will cause update issues. Try to release and renew your IP and flush your DNS to resolve any conflicts.
  4. Restart the Battle.net client to check for updates.
  5. Our games require an up-to-date operating system to run properly. Run Software Update to be sure you're using the most recent version.
Advanced Troubleshooting
  1. Configure your network to make sure your connection is not being blocked by a firewall or router.
  2. Reset your UI to make sure your User Interface files are not corrupted.
  3. Programs running in the background can conflict with the Update Agent. Try closing background applications.
  4. Running a Trace Route can help identify where the connection problems are occurring if the solutions above did not resolve the issue.

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) (Heroes of the Storm) or contact us.

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