If you’re encountering the Vanguard Error VAN 84 League of Legends message, you’re not alone. Since Riot Games integrated Vanguard into League of Legends, many players have reported connection-related errors that prevent them from launching the game or connecting to Riot’s servers.
The good news is that VAN 84 is usually one of the easier Vanguard errors to resolve. In most cases, it is linked to network connectivity issues, Riot server problems, or temporary communication failures between the Riot Client and Riot Vanguard.
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What Is Vanguard Error VAN 84 in League of Legends?
Vanguard Error VAN 84 is a connection-related error that appears when the League of Legends client cannot properly communicate with Riot’s servers or the Riot Vanguard anti-cheat system.
Players may see messages such as:
“An unexpected error with Vanguard has occurred and the client will now close.”
According to Riot’s official Vanguard error documentation, VAN 84 is categorized as a connection error and typically requires users to verify their network connection and restart the Riot Client.
Why Does VAN 84 Happen?
Several factors can trigger the Vanguard Error VAN 84 League of Legends issue.
Riot Server Outages
When Riot’s servers are undergoing maintenance or experiencing outages, Vanguard may fail to authenticate your connection.
Internet Connection Problems
An unstable internet connection can interrupt communication between your PC and Riot’s servers.
Common causes include:
- High packet loss
- Wi-Fi instability
- ISP routing issues
- Temporary modem or router problems
Riot Client Session Errors
Sometimes the Riot Client gets stuck in an invalid session and fails to reconnect properly.
Vanguard Service Issues
If the Vanguard service stops running or encounters a temporary glitch, the authentication process may fail.
Firewall or Security Software Conflicts
Windows Firewall, antivirus software, or network security tools can occasionally block Riot services.
How to Fix Vanguard Error VAN 84 League of Legends
Restart the Riot Client
This is the most effective fix for many players.
Steps:
- Close League of Legends completely.
- Open Task Manager.
- End all Riot-related processes.
- Relaunch the Riot Client.
- Start League of Legends again.
A fresh client session often resolves authentication problems.
Restart Your Computer
A full reboot restarts Riot Vanguard and clears temporary system issues.
Simply:
- Exit League of Legends.
- Restart your PC.
- Launch the Riot Client again.
Many players report VAN 84 disappearing after a simple reboot.
Check Riot Server Status
Before changing any settings, confirm whether Riot’s servers are operational.
If Riot is experiencing maintenance or outages, the only solution may be waiting until services are restored.
Verify Your Internet Connection
Because VAN 84 is primarily a connection error, checking your network is essential.
Try the following:
- Restart your router
- Switch from Wi-Fi to Ethernet
- Disable VPN services
- Close bandwidth-heavy applications
- Test your internet speed
A stable connection reduces authentication failures.
Restart the Vanguard Service
If Riot Vanguard is not running correctly, restarting the service may help.
Steps
- Press Windows + R
- Type services.msc
- Locate vgc
- Right-click and select Restart
- Launch League of Legends
This refreshes the anti-cheat service without requiring a complete reinstall.
Reset Network Settings
Corrupted network settings can interfere with Riot’s authentication servers.
Open Command Prompt as Administrator and run:
ipconfig /flushdns
netsh winsock resetAfter running both commands:
- Restart your PC
- Launch League of Legends again
This often fixes DNS and network stack issues.
Disable IPv6 Temporarily
Some players have reported success by disabling IPv6 and using IPv4-only DNS settings.
To test:
- Open Network Connections
- Open your active adapter’s properties
- Uncheck Internet Protocol Version 6 (TCP/IPv6)
- Save settings
- Restart your PC
While this isn’t an official Riot fix, it has resolved VAN 84 for some users experiencing routing problems.
Reinstall Riot Vanguard
If the error continues, reinstalling Vanguard may be necessary.
Steps
- Uninstall Riot Vanguard
- Restart your computer
- Launch the Riot Client
- Vanguard will reinstall automatically
- Restart once more if prompted
A clean Vanguard installation can remove corrupted files and restore proper communication.
Can Riot Server Maintenance Cause VAN 84?
Yes. VAN 84 frequently appears during:
- Server maintenance
- New patch deployments
- Regional service disruptions
- Heavy server traffic
If multiple players are reporting the issue simultaneously, the problem may be on Riot’s side rather than your computer.
How to Prevent Vanguard Error VAN 84
To reduce the chances of seeing VAN 84 in the future:
- Keep Windows updated
- Use a stable internet connection
- Avoid unnecessary VPNs while gaming
- Restart the Riot Client periodically
- Update network drivers
- Reboot your PC after major League of Legends patches
These best practices help maintain stable communication between Riot Vanguard and Riot’s servers.
Final Thoughts
The Vanguard Error VAN 84 League of Legends issue is usually caused by network communication problems rather than serious system failures. Most players can fix it by restarting the Riot Client, rebooting their PC, checking their internet connection, or restarting the Vanguard service. If the issue persists, reinstalling Riot Vanguard and resetting network settings are often effective solutions.
Have you encountered VAN 84 recently? Share which fix worked for you and stay tuned for the latest League of Legends troubleshooting updates.
