Fixed : League Of Legends Vanguard Error VAN 57

October 17, 2025 Freddy Error Fix 0

If you’re seeing Vanguard Error Code VAN 57 when launching League of Legends (or other Riot games like Valorant), it means Riot’s Vanguard anti-cheat isn’t running correctly.

Here’s how to fix it step by step.

✅ Fixing VAN 57: Official Riot Steps

According to Riot support, VAN 57 means Vanguard is not running. They recommend:

  • Restarting your PC and the Riot Client.

  • If that doesn’t help, uninstall Vanguard and League of Legends completely, then reinstall both fresh.

  • If it still persists, submit a support ticket.

🛠️ Step-by-Step Fix (Webvator Guide)

1. Kill Riot & Vanguard Processes

  • Open Task Manager (Ctrl+Shift+Esc).

  • End tasks for:

    • LeagueClient.exe

    • RiotClientServices.exe

    • Any Vanguard-related tasks

2. Ensure the VGC Service Is Running

  • Press Win + R, type services.msc, and locate VGC.

  • Set Startup type → Automatic, then click Start (or Restart if it’s already running). Apply changes.

3. Restart and Launch the Game

  • Reboot your PC

  • Open the Riot Client and launch League of Legends—VAN 57 should be gone

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⚙️ Additional Fixes if the Above Didn’t Work

4. Reinstall Riot Vanguard Cleanly

  • Go to Control Panel → Apps & Features, uninstall Riot Vanguard.

  • Optionally also uninstall League of Legends.

  • Delete the C:\Program Files\Riot Vanguard folder.

  • Restart PC.

  • Relaunch the Riot Client (it will reinstall Vanguard automatically).

If uninstallation fails, open Command Prompt as Administrator and run:
sc delete vgc
sc delete vgk
Then manually delete the Vanguard folder and reinstall.

5. Flush DNS & Network Cache

  • Open Command Prompt (Admin), run:

    ipconfig /release
    ipconfig /renew
    ipconfig /flushdns
    netsh winsock reset

  • Restart and try again. This clears potential networking issues blocking Vanguard.

6. Check Antivirus & Firewall

  • Add C:\Program Files\Riot Vanguard (and Riot Games folder) to antivirus exclusions

  • In Windows Security, whitelist Vanguard in Firewall & network protection

  • Temporarily disable third‑party security tools to test

7. Disable Windows Testing Mode

If your system is running in “Test Signing” mode, Vanguard may fail to start:

  • Open Command Prompt as Admin:

    bcdedit -set TESTSIGNING OFF
    bcdedit -set NOINTEGRITYCHECKS OFF

  • Restart your PC.

8. Perform a Clean Boot

  • Use msconfig to disable all non-Microsoft services and startup items.

  • Restart, then launch the game. If VAN 57 disappears, re-enable services one-by-one to identify the culprit.

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🧪 Quick Troubleshooting Table

StepAction
1️⃣End all Riot/League/Vanguard tasks via Task Manager
2️⃣Open services.msc, set VGC startup to Automatic, start/restart it
3️⃣Reboot PC, relaunch Riot Client
4️⃣Uninstall Vanguard (and League if needed), delete folder, reinstall via client
5️⃣Flush network cache (DNS/Winsock resets)
6️⃣Add Vanguard to antivirus/firewall whitelist or disable temporarily
7️⃣Disable Windows Test Signing mode (if enabled)
8️⃣Clean boot to pinpoint conflicting software

ℹ️ Need More Help?

If you’ve tried all of the above and still get VAN 57:

  • Double-check your Windows updates are current and drivers (especially GPU) are up to date.

  • Contact Riot Support with logs or screenshots—especially helpful if it’s related to drivers or Secure Boot issues.

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