How to Fix vgk.sys BSOD Error in Valorant or League of Legends

Are you getting a vgk.sys blue screen of death error when launching Valorant or League of Legends?

Here’s the full error message, “Your PC ran into a problem and needs to restart”.

Followed by, “We’re just collected some error info, and then we’ll restart for you”.

Here are a couple of stop codes “SYSTEM_THREAD_EXCEPTION_NOT HANDLED” or “CRITICAL_PROCESS_DIED”.

In this quick and easy guide, you’ll learn how to fix the what failed: vgk.sys BSOD error in Valorant or League of Legends (LoL).

How to fix vgk.sys BSOD error in Valorant or League of Legends

Fix 1: Update your BIOS

Check your motherboard by searching for “System Information” using Windows Search, and check “BaseBoard Product”, then update your BIOS:

• For Asus: Search MyASUS in the Windows search bar > click Open (install it first if not found) > in MyASUS click System Update > wait for auto-scan to list updates > select BIOS Update for Windows or BIOS Installer for Windows > click Update Selected Items > review details then click Confirm to download > wait for download to finish > click Restart > PC reboots into BIOS update screen > follow the on-screen instructions without interrupting power.
• For MSI: Search MSI Center in the Windows search bar > click Open (install it first if not found) >select Support > select Live Update > select Advanced > Yes > select the lBIOS update > Install > follow the on-screen instructions to update your BIOS.
• For GIGABYTE: Search GIGABYTE CONTROL CENTER in the Windows search bar > click Open (install it first if not found) > select the Update icon on the left sidebar > select “Check” > select “Install” to install all updates (Gigabyte MB Update library is the BIOS update) > follow the on-screen instructions to install all updates.

Fix 2: Enable Virtualization in BIOS

1. Restart your PC and press the BIOS key (e.g. F2 or DEL).
2. Look for Intel VT-x (Intel) or SVM Mode (AMD) and set it to Enabled.
3. Save and exit BIOS and launch Valorant or League of Legends.

Fix 3: Enable IOMMU/VT-d in BIOS

1. Restart your PC and press the BIOS key (e.g. F2 or DEL).
2. Look for IOMMU or VT-d and set it to Enabled.
3. Save and exit BIOS and launch Valorant or League of Legends.

Fix 4: Enable Memory Integrity in Windows Security

1. Search for “Windows Security” using the Windows Search bar and open it.
2. Select “Device Security”.
3. Select “Core isolation details”.
4. Turn on “Memory integrity”.
5. Launch Valorant or League of Legends.

Fix 5: Uninstall and reinstall Vanguard

1. Search for “cmd” using Windows Search and open it as an administrator.
2. Type the following codes, one after the other, and press enter:
   • sc delete vgc
   • sc delete vgk
3. Restart your PC.
4. Launch Valorant or League of Legends.

Further reading

How to Fix Nvidia Filters Not Working in Arc Raiders

How to Fix “Unable to Install” in Valorant

How to Fix “ntoskrl.exe” Blue Screen (BSOD) in Valorant