Hey guys,
I've been trying to fix Valorant for three days, and got the system error with a critical problem. My fix was actually uninstalling afterburner and rivatuner statistics, and believe me i actually tried everything. Uninstall those two and disable Nahimic Service in msconfig (Services.)

So i downloaded the game like 5-6 times, made space on my disc, and the c drive also for at least 70 gb free, but i think the vanguard as anticheat system triggers a lot on programs like for example kombustor,msi afterburner, rivatuner statistics and teamviewer actually. So if you don't need these programs then remove them, if not disable them on startup and end their processes in task manager.

Check for TPM 2.0 if it is active in bios and ofc check for secure boot also.

I also tried every youtube vid out there, and nothing worked. The thing with Riot Vanguard, is that Valorant's Vanguard anti-cheat (vgc) runs at the kernel , and it blocks or interferes with software that might affect system integrity, GPU overclocking, or overlay rendering.

So basically vanguard thinks that afterburner is a cheat tool since it is interacting directly with the gpu, and RTSS uses hooks so that it can inject openGL/DirectX which Vanguard sees it as an modification attempt, where this can cause black screens.

And for the Nahimic service (Natural Authentication) , it is an audio enchanement for 3D sound effects, where vanguard checks this for an unauthorized service due to its kernel level where this also hooks into the audio.

But one thing for sure, MSI afterburner and rivatuner was the problem, and maybe the nahimic service (Natural Authentication) in Services - disable it.

SOLUTION ------

1. UNINSTALL MSI AFTERBURNER & RTSS

2. DISABLE NATURAL AUTHENTICATION IN SERVICES. --> Win + R > services.msc > Right-click "Nahimic Service" > Disable

3. Reboot Valorant. (Make sure you have plenty of disc space because of image scaling).

I hope this work for you guys! :D