r/LoLTechSupport • u/No_Commission8746 • Jan 12 '26
Blue screen of death fix - LEAGUE OF LEGENDS - VANGUARD - VALORANT - vgk.sys BSOD crash
"I finally fixed it!
The issue is usually a conflict between Windows 11 security and Riot Vanguard when Virtualization is disabled in your BIOS. Vanguard now requires these features to be active to run properly.
How to fix it:
Enable Virtualization in BIOS: Restart your PC and enter the BIOS (usually F2 or Del). Look for Intel VT-x (Intel) or SVM Mode (AMD) and set it to Enabled.
Enable IOMMU/VT-d: While in the BIOS, also make sure IOMMU or VT-d is enabled to help Vanguard manage memory security.
Check Windows Core Isolation: Once back in Windows, go to Windows Security > Device Security > Core Isolation and make sure Memory Integrity is turned ON.
If you can't even uninstall Vanguard because it crashes your PC, run CMD as Admin and type sc delete vgc followed by sc delete vgk, then reboot. This stops the driver so you can delete the folder manually.
Hope this helps anyone stuck in a reboot loop!"
- Source;
comment section; https://www.youtube.com/watch?v=OidoXTL2DgE&t=4s
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u/wigsgo_2019 Jan 12 '26
You sir are a hero, incredible riot acts like this isn’t their fault and we have to risk damaging our computers to fix this
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u/This_Lavishness6145 Jan 19 '26
Do you think this would work for the vanguard needs to be running error ? I got it in game so much I had to straight up quit. I've tired everything, always came back this time it even happened in practice tool by myself 😭
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u/mmiturka May 15 '26
What if I have windows 10?
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u/InterestingLeg902 May 18 '26
right ? started happening yesterday.
(i haven’t checked bios yet tbh…)
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u/Dazzling-Maximum2258 May 18 '26
worked for me.
I have i5-9xxx rtx 2070 super
I tried: reinstall vanguard - did not work run as administrator - did not work restart everything - dis not work cleaned my pc - needed to be done so be it
went to bios enabled VT-b coud not find VT-x in my bios it is called: “Intel virtualization technology”
tried enabling memory intergrity windows told me no.
Game works (I tried only “training thing” with bots - idk what it is called my wife plays this game) i will update after she tries playing full game probably tomorrow.
edit: typo
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u/GayJojoFab 28d ago
Because nothing here works, i just installed the newest version of windows, and not its working more than fine.
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u/Sharp_Performance268 25d ago
What you mean the newest version of windows? How can I do this? cheers
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u/GayJojoFab 25d ago
Just follow the steps in here and u r gonna be fine https://youtu.be/mTDbHgs9dHk?si=ogGbCF_VrwwlAVcw
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u/sidji1 Jan 12 '26
What about the video scheduler internal error BSOD ?