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The error code VAN9003 indicates that Vanguard requires Secure Boot to be enabled. Follow these steps to enable Secure Boot:
1. Restart your computer and enter the BIOS/UEFI firmware settings. This is usually done by pressing Delete, F1, F2, F10, or Esc during startup (your motherboard's manual will specify which key to press).
2. Once in BIOS/UEFI, look for the Secure Boot option. It's typically found under the "Boot" or "Security" tab.
3. Enable Secure Boot. Note: Before enabling Secure Boot, ensure your system is configured with UEFI (not Legacy BIOS). Enabling Secure Boot on a Legacy BIOS setup can make Windows unbootable.
4. Save the changes and exit the BIOS/UEFI setup.
For more detailed instructions, refer to these support articles:
- Addressing Virtualization-based security (VBS) settings on Windows 10 for VAN9005
- VAN9001 or VAN9003 Error on Windows 11
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