VAN 128Vanguard couldn’t finish its startup checks
Windows security or debugging settings are stopping Vanguard from verifying your PC.
Try these in order
- Restore Windows security to a normal state. Riot has a guide that undoes settings which block Vanguard.
- Turn off debug memory dumps: press the Windows key, type sysdm.cpl, go to Advanced → Startup and Recovery → Settings, set “Write debugging information” to (none), click OK and restart.
- Install all Windows updates and restart.
- Set the Vanguard service to start automatically: press Win+R, run services.msc, open vgc, set Startup type to Automatic and click Start.
- Uninstall Riot Vanguard from Windows Apps, restart your PC, then launch your game so Vanguard installs again.
- Do a clean boot to find out whether a background app or service is getting in Vanguard’s way.
- Reinstall the game to replace any damaged or missing game files.
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 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.
- VAN 135Vanguard couldn’t initialize on your PCVanguard couldn’t verify that your PC is ready or failed while starting.