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The error code VAN9003 indicates that VANGUARD, the anti-cheat system for VALORANT, requires Secure Boot to be enabled in your BIOS/UEFI settings. To enable Secure Boot:
1. Restart your computer and enter the BIOS/UEFI settings. This is typically done by pressing a key during startup, like F2, F10, DEL, or ESC (check your motherboard manual for exact instructions).
2. Locate the Secure Boot option in the Security, Boot, or Authentication tab.
3. Enable Secure Boot.
4. Save the changes and exit the BIOS/UEFI settings.
Important: Before enabling Secure Boot, ensure your system is using UEFI mode. Enabling Secure Boot on a system configured with Legacy BIOS can render your Windows installation unbootable.
For detailed instructions, please refer to this support article.
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