Disconnection and Latency Issues in Blizzard Games

Updated: 2 months ago
Article ID: 5338
Relevant Games:

Common Problems

  • Why am I experiencing connectivity problems while playing any Blizzard game?
  • Why am I getting DCd when I play Blizz games but nothing else?
  • Disconnected with error BLZ51900075

Before trying any of the following steps check the BlizzardCS Twitter. If you're experiencing connection or login issues with World of Warcraft, check the Realm Status page (EU) / Realm Status page (US). If the service is offline, try again later. If the servers are available, or if your game doesn't have a Service Status page, continue troubleshooting.

If you are unable to connect, or if you are experiencing high latency or frequent disconnects while playing the game, follow the steps below to resolve the issue.

Before trying any of the following steps, check the Service Status page (World of Warcraft) or the BlizzardCS Twitter. If the service is offline, try again later. If the servers are available, or if your game doesn't have a Service Status page, continue troubleshooting.

  1. Reset your user interface to make sure your files and addons are not corrupted.
    Note: This step only applies to World of Warcraft.
  2. Reset your network devices to make sure your router hasn't become flooded with data.
  3. Release and renew your IP and flush your DNS to resolve any network conflicts.
  4. Update your drivers to resolve any compatibility issues.
  5. If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
  6. Try closing background applications to resolve any software conflicts.
Advanced Troubleshooting
  1. Outdated operating systems may contribute to connection issues. Try updating Windows.
  2. Your Windows Hosts file may contain incorrect entries. Check and reset any incorrect Hosts file entries.
  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. Disable any proxies that may interfere with the login module.
  5. Disable or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
  6. Old firmware on your modem and router along with old drivers on your network card can cause issues when your network needs to deal with complex game connections. The manufacturer's website for your hardware should have firmware and driver downloads available, as well as instructions on how to apply firmware updates.

Mac

Before trying any of the following steps, check the Service Status page (World of Warcraft). If the service is offline, try again later. If the servers are available, or if your game doesn't have a Service Status page, continue troubleshooting.

  1. Reset your user interface to make sure your files and addons are not corrupted.
    Note: This step only applies to World of Warcraft.
  2. Reset your network devices to make sure your router hasn't become flooded with data.
  3. Run Software Update to check for pending updates to software, drivers, and firmware.
  4. If you're using a wireless connection, optimize your internet connection to rule out a connection issue.
  5. Try closing background applications to resolve any software conflicts.
  6. Release and renew your IP and flush your DNS to resolve any network conflicts.
Advanced Troubleshooting
  1. Repair Disk Permissions to resolve any permission conflicts with logon modules.
  2. Issues with your network card, the hardware that handles your computer's network connection, may cause connectivity issues. Try troubleshooting your network card.
  3. Disable any proxies that may interfere with the login module.
  4. Disable or temporarily uninstall any security programs, which may mistakenly identify the login module as a security threat.
  5. Old firmware on your modem and router along with old drivers on your network card can cause issues when your network needs to deal with complex game connections. The manufacturer's website for your hardware should have firmware and driver downloads available, as well as instructions on how to apply firmware updates.

Tried everything here?

If you have tried these steps and still require assistance, visit our Technical Support Forums (World of Warcraft) (StarCraft II) (Diablo III) (Hearthstone) (Heroes of the Storm) (Overwatch) or contact us.