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Consistent BSOD - Riot Vanguard - How to prevent / fix ongoing issue?

Anonymous
2025-07-05T15:13:18+00:00

*PLEASE NOTE* I was confused by the select a product requirement for this question. I am unsure if this is the right place to ask as Windows 11 was not an option. Please redirect or advise how and where to post if this is not the right place

Roughly a week ago I started experiencing the Blue Screen of Death. Unable to source the issue via event viewer, I referred to the Minidump files the crashes were creating.

Using WinDbg, I was able to find that vgk.sys is the driver causing the failure. I am unfamiliar with how to read the analysis and see what is causing the driver to fail, and there is very little online regarding this issue.

The crashes are consistent with Riot Vanguard, the anti-cheat software used by Riot for it's games League of Legends and Valorant.

Crash times are inconsistent. I've crashed at:
System Startup

Launching Riot Client

Accepting League of Legends game queues.

I've also crashed without ever launching the Riot Client, but noticed Vanguard is a mandatory start-up application. Crashes happen seconds, minutes or hours after startup or interaction with League of Legends or the Riot Client.

I've tried the following:

Updating Windows

Updating graphics drivers

Updating audio drivers

Running Windows Defender quick and full system scans

Utilized the repair tool to find any corrupted windows files

Uninstalled and reinstalled Riot Vanguard

Uninstalled and reinstalled League of Legends

Uninstalled and reinstalled both above applications at the same time

Ran Riot Client as Administrator

I have not tried reinstalling Windows. That is my last resort and I'm unsure if that would fix the problem anyway.

Here is a link to the minidump files. I've zipped them. https://drive.google.com/file/d/1Aw1bc0lBH0BHoGgNcPb6cJbJK5o85XF2/view?usp=sharing

Here is my system information:

OS: Windows 11 Home

Version: 24H2

Processor: Intel(R) Core(TM) i7-14700K (3.40 GHz)

RAM: 32GB DDR5 Corsair

System Type: 64-bit

GPU: NVIDIA GeForce RTX 4070 Ti

https://drive.google.com/file/d/1Aw1bc0lBH0BHoGgNcPb6cJbJK5o85XF2/view?usp=sharing Updated link for sharing

Please let me know if you need anything additional. All help and suggestions are appreciated and welcomed.

Windows for home | Windows 11 | Performance and system failures

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

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  1. Gérard Oomens 122.6K Reputation points Volunteer Moderator
    2025-07-05T17:51:26+00:00

    You can post Windows questions in the Q&A forum:

    Windows for home - Microsoft Q&A

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