Common Problems
Before trying the following steps, check the BlizzardCS Twitter for any service interruptions.
Also, before trying the steps below, exit the app and launch it again.
- 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.
Delete the Battle.net Tools folder to automatically rebuild outdated or corrupt files.
Advanced Troubleshooting
Check your network configuration to find any issues with your firewall, router, or port settings.
If you're using a VPN, try removing it.
Disable any proxies that may interfere with the login module.
Run a security scan to remove any viruses or malware infections.
Configure your security software's exception list to allow Blizzard applications to run.
Try creating a new administrator account to resolve permissions issues.
Your Windows Hosts file may contain incorrect entries. Check and reset any incorrect Hosts file entries.
Old firmware on your modem and router can cause issues with complex game connections. Visit the manufacturer's website for instructions on how to apply firmware updates.
Uninstalling and reinstalling the Battle.net App may resolve rare launcher issues.
See AlsoBLZBNTBNA00000A8E
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.
Delete the Battle.net Tools folder to automatically rebuild outdated or corrupt files.
Advanced Troubleshooting
Check your network configuration to find any issues with your firewall, router, or port settings.
If you're using a VPN, try removing it.
Disable any proxies that may interfere with the login module.
Run a security scan to remove any viruses or malware infections.
Configure your security software's exception list to allow Blizzard applications to run.
Old firmware on your modem and router can cause issues with complex game connections. Visit the manufacturer's website for instructions on how to apply firmware updates.
Uninstalling and reinstalling the Battle.net App may resolve rare launcher issues.
Tried everything here?
If the steps above did not resolve your problem, visit our Technical Support forum or contact us.
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