Therefore, to ensure fair competition Riot Games decided to cease support for Windows 10 builds earlier than 1709. Now, whenever you try to open VALORANT on these older builds you will receive error “This build of Vanguard is out of compliance…”. This error code is accompanied with “VAN9003” and “VAN 9001“
1. Install Latest Build of Windows
As this issue mainly occurs for outdated builds of Windows 10. It is recommended to update your Windows to latest build available before changing any of your Windows core settings. Follow these steps to update your Windows: Check to see if Valorant is working now.
2. Change Legacy BIOS to UEFI and Enable Secure Boot
Legacy BIOS do not support Secure boot. Secure Boot only works in UEFI (Unified Extensible Firmware Interface) BIOS mode. UEFI BIOS mode is required to protect the computer from viruses and malicious software by ensuring that only trusted software is launched during the boot process. Riots Vanguard, like most applications nowadays, requires this feature to function properly. Follow these steps to check and convert legacy BIOS to UEFI and enable secure boot:
2.1 Turn on Secure Boot
Once the BIOS mode has been set to UEFI, all you need to do is turn on secure boot. To turn it on follow these steps: This should fix your VAN 9003 error code issue; if it does not, you will need to reinstall Vanguard or clean install a new build of Windows and redo this fix, as some settings or corrupted files will be the source of this problem, which a newer and cleaner build will fix.
4. Reinstall Riot Vanguard
Reinstalling Vanguard gets rid of any corrupted files that is preventing it from launching. All you need to do is uninstall it and then launch any Riot game, and it will download and install again automatically. You can now quickly uninstall and reinstall Riot Vanguard using the steps listed above. Check to see if Valorant is working now.
5. Clean Install Windows
If your Vanguard still isn’t running and nothing else appears to be working, try a clean install of Windows. A clean Windows installation is an excellent way to restore your computers to its original state. By clean installing, you can remove any damaged files or settings that may be causing problems and ensure that the program Riot Vanguard you’re attempting to run functions properly. The procedure is rather easy, and it’s a good idea to perform it occasionally to keep your computer in peak condition.
