VAN 9003Secure Boot isn’t enabled
Vanguard needs Secure Boot and your PC doesn’t have it turned on.
Try these in order
- Press Win+R, run msinfo32 and check that Secure Boot State says On.
- If it’s off, restart into your BIOS/UEFI and turn Secure Boot on. This needs UEFI mode and a GPT disk. Riot’s Secure Boot guide covers the different cases.
- Restart Windows and launch the game again.
Still broken? Restart your PC once more, then contact Riot Support with your logs.
Based on Riot’s official guide.
More vanguard errors
- VAN 68Vanguard lost its connection while the game was runningVanguard lost the session it needs while your game was starting or playing.
- VAN 1067Vanguard ran into a problem while startingVanguard hit an unexpected issue while starting or checking in with Windows.
- VAN 128Vanguard couldn’t finish its startup checksWindows security or debugging settings are stopping Vanguard from verifying your PC.
- VAN 185Vanguard, Riot Client and the game lost their sessionA session or connection problem between the game, Riot Client and Vanguard.
- VAN 84Vanguard couldn’t confirm your PC is readyVanguard couldn’t verify your PC or hit a problem while starting up.