VAN 57 Error League of Legends | Step-By-Step Fix

Error VAN 57 in League of Legends (and Valorant) means that Riot Vanguard, the anti-cheat software, failed to initialize properly. Essentially, the game cannot talk to the anti-cheat system, so it refuses to let you play.

Here is the step-by-step guide to fixing it, starting with the most effective solution.

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Fix 1: The “Clean” Restart (Most Likely Fix)

Vanguard is a kernel-level driver, meaning it loads when Windows starts. If it crashes or fails to load, you cannot just restart the game; you must restart the PC.

1. Close the Riot Client and League of Legends completely.

2. Restart your computer.

3. Try launching the game again.

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Fix 2: Force Start the “vgc” Service

Sometimes the Vanguard service (called vgc) gets stuck or is set to “Manual” startup, causing it to fail.

1. Press Windows Key + R on your keyboard.

2. Type services.msc and hit Enter.

3. Scroll down until you find a service named vgc.

4. Right-click vgc and select Properties.

5. Change the Startup type to Automatic.

6. Click Start (if the button is active) to force it to run immediately.

7. Click Apply and OK, then restart your computer.

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Fix 3: Reinstall Vanguard (If the above fail)

If the files are corrupted, you need to force the Riot Client to redownload them.

1. Press Windows Key + I to open Settings.

2. Go to Apps -> Installed Apps.

3. Search for Riot Vanguard (NOT League of Legends).

4. Click the dots (or Modify/Uninstall) and select Uninstall.

5. Once uninstalled, Restart your computer.

6. Open the Riot Client. It will detect that Vanguard is missing and automatically download/install it.

7. Restart your computer one last time to finalize the installation (required).

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Fix 4: Check for Conflicting Software

If you are still getting the error, something might be blocking Vanguard:

• Antivirus: Temporarily disable your antivirus (like Norton, McAfee, or Avast) to see if the game launches. If it does, you need to add an exception for the Riot Vanguard folder.

• FACEIT / ESEA: If you have other anti-cheat software installed (like FACEIT AC), try closing or uninstalling them, as they can sometimes conflict with Vanguard.