Valorant Error Code VAN 9003 Fix

Updated March 11, 2026 • Expert Guide • Prime AI Tech Solutions

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Understanding and Resolving Valorant Error Code VAN 9003: An Expert Guide

Valorant, Riot Games' tactical first-person shooter, demands a high level of system integrity to ensure a fair and secure playing environment. This commitment to security is primarily enforced through Vanguard, Riot's proprietary anti-cheat system. With the advent of Windows 11 and its heightened security requirements, many players have encountered Error Code VAN 9003. This error signifies that your system does not meet the necessary security standards, specifically the enablement of Trusted Platform Module (TPM) 2.0 and Secure Boot.

This comprehensive guide, crafted by an expert in system security and gaming diagnostics, will delve deep into the technical underpinnings of VAN 9003, providing a detailed, step-by-step methodology to diagnose and resolve it. Our goal is to equip you with the knowledge and actionable steps to get you back into the game, ensuring your system maintains optimal security without compromising your gaming experience.

Infographic illustrating Valorant VAN 9003 error, TPM 2.0, and Secure Boot requirements

The Technical Core: TPM 2.0 and Secure Boot Explained

To effectively resolve VAN 9003, it's crucial to understand the technologies at its heart:

  • Trusted Platform Module (TPM) 2.0: This is a cryptographic processor on your motherboard that stores cryptographic keys and performs security-related functions. It acts as a hardware-based security anchor, protecting sensitive data and verifying system integrity. Windows 11 mandates TPM 2.0 for enhanced security, enabling features like BitLocker encryption and secure authentication. Vanguard leverages TPM 2.0 to ensure the operating system's integrity from boot-up, preventing rootkits and other low-level malware from compromising the game.
  • Secure Boot: A feature of UEFI (Unified Extensible Firmware Interface) firmware, Secure Boot ensures that only software trusted by the PC manufacturer (e.g., operating system bootloaders, drivers) can run during startup. It prevents malicious software from loading before the operating system, creating a more secure boot environment. Valorant's Vanguard requires Secure Boot to guarantee that no unauthorized or tampered software interferes with the game client or anti-cheat system during the critical boot phase.

The VAN 9003 error specifically indicates that either TPM 2.0 is not enabled, Secure Boot is not enabled, or your system's partition style (MBR) is incompatible with Secure Boot (which requires GPT).

Pre-Requisites and Initial System Checks

Before diving into the fixes, verify your system's current status:

  1. Check Windows Version:
    • Press Win + R, type winver, and press Enter.
    • While VAN 9003 is often associated with Windows 11 requirements, it can also appear on Windows 10 if Riot's anti-cheat detects a security vulnerability or non-compliance.
  2. Check TPM Status:
    • Press Win + R, type tpm.msc, and press Enter.
    • Look for "TPM Manufacturer Information" and "Specification Version". It should state "2.0". If it says "Compatible TPM cannot be found" or "Specification Version 1.2", you'll need to enable or update it.
  3. Check Secure Boot Status:
    • Press Win + R, type msinfo32, and press Enter.
    • In the System Information window, look for "BIOS Mode" (should be UEFI) and "Secure Boot State" (should be On).
    • If "BIOS Mode" is "Legacy" or "Secure Boot State" is "Off" or "Unsupported", you'll need to adjust your BIOS/UEFI settings.

Step-by-Step Guide: Resolving Valorant Error Code VAN 9003

Follow these steps carefully to enable TPM 2.0 and Secure Boot on your system. Remember that BIOS/UEFI interfaces vary between manufacturers (ASUS, MSI, Gigabyte, Dell, HP, etc.), so the exact menu names might differ slightly.

Step 1: Enable TPM 2.0 in BIOS/UEFI

  1. Access BIOS/UEFI: Restart your computer. As it boots, repeatedly press the designated key to enter BIOS/UEFI setup. Common keys include Del, F2, F10, or F12. Consult your motherboard or PC manufacturer's manual if unsure.
  2. Locate TPM Settings: Once in BIOS/UEFI, navigate to sections like "Security," "Advanced," "Boot," or "Peripherals."
    • For Intel CPUs, look for "Intel Platform Trust Technology" (PTT) or "Intel PTT."
    • For AMD CPUs, look for "AMD fTPM" or "fTPM Switch."
  3. Enable TPM: Change the setting from "Disabled" to "Enabled."
  4. Save and Exit: Save your changes (usually F10) and exit BIOS/UEFI. Your system will restart.
  5. Verify TPM: After Windows boots, re-check TPM status using tpm.msc. It should now show Specification Version 2.0.

Step 2: Enable Secure Boot and Convert Disk to GPT (If Necessary)

Secure Boot requires your system drive to be formatted with the GUID Partition Table (GPT) style, not Master Boot Record (MBR).

  1. Check Disk Partition Style:
    • Press Win + X and select "Disk Management."
    • Right-click on your primary drive (where Windows is installed, usually Disk 0), select "Properties."
    • Go to the "Volumes" tab. Look for "Partition style." If it says "Master Boot Record (MBR)," you'll need to convert it to GPT. If it's already "GUID Partition Table (GPT)," proceed to step 3.
  2. Convert MBR to GPT (CRITICAL STEP):

    WARNING: While the mbr2gpt tool is designed to be non-destructive, it is always recommended to back up your important data before performing disk conversions.

    • Open Command Prompt as an administrator (Search for "cmd," right-click, "Run as administrator").
    • Type mbr2gpt /validate and press Enter. This checks if your disk is eligible for conversion. It should return "Validation completed successfully." If it fails, you might have too many partitions or other issues requiring manual intervention (which is beyond the scope of this general guide and may require data backup and clean Windows reinstallation).
    • If validation is successful, type mbr2gpt /convert /disk:0 (replace 0 with your system disk number if different, found in Disk Management) and press Enter.
    • Allow the process to complete. It will convert your disk to GPT.
  3. Enable Secure Boot in BIOS/UEFI:
    • Restart your computer and re-enter BIOS/UEFI (e.g., Del, F2).
    • Navigate to "Boot," "Security," or "Authentication" settings.
    • Look for "Secure Boot." It might be under an "OS Type" or "Boot Mode" setting.
    • Ensure "OS Type" is set to "Windows UEFI mode" or "UEFI mode" (not "Legacy" or "CSM").
    • Enable "Secure Boot." Sometimes, you might need to "Restore Factory Keys" or "Install Default Secure Boot Keys" first.
    • Save changes and exit BIOS/UEFI.
  4. Verify Secure Boot: After Windows boots, re-check msinfo32. "BIOS Mode" should be "UEFI" and "Secure Boot State" should be "On."
Professional technical interface of a BIOS/UEFI menu showing Secure Boot and TPM settings

Step 3: Update Windows and Drivers

Ensure your system is fully updated, as outdated components can sometimes interfere with security features.

  • Windows Update: Go to "Settings" > "Update & Security" (Windows 10) or "Windows Update" (Windows 11) and check for all available updates. Install them.
  • Chipset Drivers: Visit your motherboard manufacturer's website and download the latest chipset drivers for your specific model. Install them.

Step 4: Reinstall Vanguard and Valorant (If Necessary)

If the error persists after enabling TPM 2.0 and Secure Boot, a clean reinstallation of Vanguard and Valorant might resolve any corrupted files or misconfigurations.

  1. Uninstall Valorant and Riot Vanguard from "Add or remove programs."
  2. Restart your PC.
  3. Download and reinstall Valorant from the official website.

Common Mistakes and Troubleshooting

  • Incorrect BIOS/UEFI Navigation: BIOS menus are complex. Take your time, read descriptions, and avoid changing unrelated settings.
  • Forgetting MBR to GPT Conversion: This is the most common reason Secure Boot remains greyed out or "Unsupported." Ensure your disk is GPT before trying to enable Secure Boot.
  • TPM Not Found/Not Recognized: If tpm.msc still fails after enabling, ensure your CPU and motherboard actually support TPM 2.0. Older hardware might only support TPM 1.2 or none at all. A BIOS update might sometimes resolve detection issues.
  • BitLocker Issues: If you use BitLocker, enabling TPM 2.0 or Secure Boot might trigger a recovery key prompt. Have your BitLocker recovery key ready.
  • Virtualization (VT-x/AMD-V): Some BIOS settings for virtualization can sometimes conflict. Ensure these are enabled if you use Windows Sandbox or WSL, but they generally shouldn't affect VAN 9003 directly.

Partition Style Comparison: MBR vs. GPT for Secure Boot

Understanding the difference between MBR and GPT partition styles is crucial for enabling Secure Boot.

Feature Master Boot Record (MBR) GUID Partition Table (GPT)