How to Fix Vanguard Error VAN 57 on PC

Vanguard Error VAN 57 usually appears when Riot Vanguard fails to start correctly due to system configuration issues or conflicts at startup. This guide will walk you through the steps to resolve the problem.

Make sure you follow the instructions carefully. I experienced this exact issue myself and was able to fix it using the steps below.

---

Fix 1: Restart Your PC

Before trying anything advanced, start with a full system restart.

1. Click the Windows Start icon
2. Select Power
3. Click Restart

After your PC restarts, open the Riot Client and try launching League of Legends again.
If the error still appears, continue with the next steps.

---

Fix 2: Edit the Windows Registry (Advanced)

⚠ Important Warning:
Editing the Windows Registry incorrectly can cause system problems. If you are not comfortable making registry changes, consider contacting technical support before proceeding.

Step 1: Open Registry Editor

1. Press Windows + R to open the Run dialog
2. Type regedit
3. Click OK
4. Click Yes when prompted

Step 2: Navigate to the Correct Registry Path

In the Registry Editor, follow this path carefully:

HKEY_LOCAL_MACHINE
└── SOFTWARE
    └── Microsoft
        └── Windows NT
            └── CurrentVersion
                └── Image File Execution Options

Step 3: Check for DevOverrideEnable

• Look for a key named DevOverrideEnable
• If it exists:
  1. Double-click it
  2. Set Value data to 0
  3. Click OK

Step 4: Create the Key (If It Does Not Exist)

If DevOverrideEnable is not present:

1. Right-click on Image File Execution Options
2. Select New > Key
3. Rename it exactly to: DevOverrideEnable
4. Press Enter
5. Double-click the newly created key
6. Set Value data to 0
7. Click OK

---

Fix 3: Restart Your PC Again

After making the registry changes:

1. Close Registry Editor
2. Restart your PC

Once your system boots back up, open the Riot Client and launch League of Legends. The VAN 57 error should now be resolved.

---

Conclusion:

Vanguard Error VAN 57 is commonly caused by:

• Riot Vanguard not starting properly
• Conflicting system or developer settings
• Incorrect registry values

Restarting your PC and correcting the DevOverrideEnable registry value resolves the issue in most cases.