Fix Valorant VAN 84 Error Windows 11 Latest Solution 2025

What is Valorant VAN 84 Error?

Valorant VAN 84 is a Vanguard anti-cheat error that prevents the game from starting on Windows 11. The error indicates Vanguard failed to initialize properly, usually related to system security features, driver conflicts, or boot-level access issues required by Riot's anti-cheat system.

Why VAN 84 occurs on Windows 11

Windows 11 has stricter security requirements:

• Enhanced kernel-level protection interferes with Vanguard
• TPM 2.0 and Secure Boot requirements cause conflicts
• Windows Defender blocking Vanguard driver initialization
• Core isolation features preventing low-level driver access
• VBS (Virtualization-Based Security) interfering with anti-cheat

Common causes

• Vanguard driver not starting at boot time
• Secure Boot disabled in BIOS/UEFI
• TPM 2.0 not enabled or detected
• Windows 11 Core Isolation blocking Vanguard
• Conflicting antivirus software (especially third-party)
• Outdated motherboard BIOS/UEFI firmware
• VBS (Virtual Machine Platform) enabled conflicting with Vanguard

Step-by-step fixes

1. Enable Secure Boot - Restart > BIOS > Security > Secure Boot > Enable
2. Enable TPM 2.0 - BIOS > Advanced > TPM Device > Discrete TPM 2.0
3. Disable Core Isolation - Windows Security > Device Security > Core Isolation > Turn off
4. Disable VBS/Virtualization - Turn Windows features on/off > Uncheck Virtual Machine Platform
5. Uninstall Vanguard - Riot Vanguard system tray > Uninstall, then restart PC
6. Reinstall Vanguard - Launch Valorant, let it reinstall Vanguard fresh
7. Update BIOS/UEFI - Download latest from motherboard manufacturer website
8. Clean boot Windows 11 - Disable all startup programs except Vanguard

Advanced Windows 11 specific fixes

For persistent VAN 84 on Windows 11:

• Disable Windows Defender realtime protection temporarily during first launch
• Check Event Viewer for Vanguard driver loading errors
• Run SFC scan - sfc /scannow in elevated Command Prompt
• Reset Windows Security settings to defaults
• Ensure Windows 11 is fully updated (KB patches often fix driver issues)
• Disable Memory Integrity in Windows Security (separate from Core Isolation)

BIOS settings checklist

Critical BIOS/UEFI settings for Vanguard:

• Secure Boot: Enabled (standard mode, not custom)
• TPM 2.0: Enabled and visible to OS
• Virtualization (Intel VT-x / AMD-V): Can be enabled or disabled
• CSM/Legacy Boot: Disabled (use UEFI only)
• Fast Boot: Disabled temporarily for testing

If nothing works

Last resort solutions:

• Contact Riot Support with system info
• Try Windows 11 reset keeping files
• Check if Windows is activated (pirated Windows may cause driver issues)
• Test with different Windows 11 user account
• Verify hardware compatibility - some older systems struggle with Windows 11 + Vanguard

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