If you are seeing errors related to vgk.sys, you are dealing with the kernel-mode driver for Riot Vanguard, the anti-cheat system used by games like Valorant and League of Legends.
Issues with this driver typically manifest as "Blue Screen of Death" (BSOD) crashes or "VAN" connection errors. 🛠️ Common Fixes for vgk.sys
Restart and Reinstall: Start by simply restarting your PC. If the error persists, uninstall Riot Vanguard
from your Apps & Features menu, then relaunch the game to trigger an automatic re-installation.
Update Graphics Drivers: Outdated display drivers are a frequent cause of vgk.sys conflicts. You should completely uninstall your current drivers via Device Manager and download the latest version directly from the NVIDIA, AMD, or Intel website.
Enable Secure Boot and TPM 2.0: For Windows 11 users, Vanguard requires TPM 2.0 and Secure Boot to be enabled in your BIOS settings to function correctly.
Disable Conflicting Software: Tools like VPNs, proxies, or certain monitoring software (like MSI Afterburner) can sometimes flag the driver. Try disabling these before launching the game. 🧩 Understanding the Driver's Role
Because Vanguard operates at the kernel level, it starts when your computer boots up to prevent cheats from loading before the game does. While this makes it highly effective, it also means any instability in the driver can crash your entire operating system.
If these steps don't work, you can check for specific error codes on the VALORANT Support Page or reach out to Riot Games Support for a log analysis.
Are you currently getting a specific VAN error code or a Blue Screen? VAN: Incompatible Software - VALORANT Support
A "VGK Driver" typically refers to the kernel-mode driver for Vanguard, the anti-cheat software developed by Riot Games for titles like Valorant and League of Legends. Unlike traditional anti-cheat systems that run at the user level, VGK operates at "Ring 0," the most privileged level of a computer’s operating system. Why It Exists
The primary goal of the VGK driver is to ensure a fair playing field. In competitive gaming, modern cheats often attempt to hide themselves within the operating system’s kernel before a game even launches. By starting at boot-up, VGK can verify that no unauthorized software is tampering with the system's memory or hardware, effectively blocking "wallhacks" and "aimbots" that user-level scanners might miss. Privacy and Performance Concerns
Because the driver runs with high-level permissions and is active from the moment you turn on your PC, it has been a subject of debate.
Security: Critics argue that any vulnerability in a kernel-mode driver could potentially allow hackers to take control of a system. Riot Games has countered this by offering "bug bounties" to security researchers to find and fix flaws. Vgk Driver
System Impact: Some users report that the driver can conflict with other software—such as temperature monitors or specific hardware drivers—leading to system instability or "Blue Screen of Death" (BSOD) errors. Managing the Driver
Riot designed the driver to be visible and manageable. You can see the Vanguard icon in your system tray; from there, you can disable or exit the driver. However, if the driver is not running, you cannot launch Riot’s protected games. To play again, a full system reboot is required to re-initialize the driver at the kernel level.
In short, the VGK driver is a powerful tool designed to trade a degree of system privacy and accessibility for a cheat-free gaming experience.
If you are experiencing technical errors (like BSOD or "Vanguard Not Initialized"). If you need help disabling or uninstalling it. If you are concerned about its privacy/security impact.
(often referred to as the VGK Driver) is a kernel-mode driver that serves as the core component of Riot Vanguard , the anti-cheat system for games like League of Legends How It Works Startup Execution
: Unlike standard software, the vgk.sys driver loads as soon as you turn on your computer. This allows it to detect advanced cheats that attempt to run before the game even launches. Kernel Access
: It operates at the highest privilege level of the operating system to monitor for unauthorized modifications or software that could be used for cheating. Data Collection
: Riot Games states that while the driver is active at boot, it does not scan your system unless the game is actually running, and it is not used to collect personal information. Common Issues & Troubleshooting The driver is well-known for causing Blue Screen of Death (BSOD)
errors, typically labeled "System Thread Exception Not Handled". If you're experiencing crashes, try these standard fixes: Update or Reinstall Vanguard
: Outdated versions are a primary cause of instability. Uninstall "Riot Vanguard" from your programs and restart the game client to prompt a fresh installation. Set VGC Service to Automatic services.msc , and hit Enter. , right-click it, and select Properties Set the Startup type to and ensure the service is started. BIOS Adjustments
: For users with 13th or 14th Gen Intel CPUs, crashes can sometimes be solved by adjusting BIOS settings like or disabling automatic overclocking. Core Isolation : Enabling Memory Integrity
in Windows Security can sometimes resolve compatibility issues with the driver. Microsoft Learn Can You Disable It?
You can disable the driver by right-clicking the Vanguard icon in your system tray and selecting "Exit Vanguard" . However, the game will not run If you are seeing errors related to vgk
without the driver active; you would need to restart your computer to re-enable it before playing. or more info on how it impacts system performance Further Exploration Official Riot Games Troubleshooting Guide for specific hardware fixes. Engadget's report on Riot's response to privacy concerns regarding the driver. See technical community discussions on Reddit's Valorant Tech Support for user-submitted solutions.
The vgk.sys driver is the core kernel-level component of Riot Vanguard, the proprietary anti-cheat system developed by Riot Games for titles like Valorant and League of Legends. Unlike standard game software, this driver operates at a deep level of the Windows operating system (Ring 0) to prevent sophisticated cheating tools from loading before the game itself. How the VGK Driver Works
The primary function of the vgk.sys driver is to establish a "trusted" state for your PC.
Startup Activation: The driver loads as soon as you boot your computer. This ensures that no cheat software can be "hooked" into the system before Vanguard is active.
Kernel-Level Access: Operating at the kernel level allows the driver to monitor system memory and hardware calls, which is necessary to detect modern cheats that try to bypass standard user-level security.
Always-On Requirement: If you disable or uninstall the driver, Riot games will refuse to launch until you reboot your PC to re-initialize the driver's secure environment. Common Issues: The "Blue Screen of Death" (BSOD)
Because it operates so deeply within the system, conflicts with the vgk driver often result in critical system crashes, commonly known as the Blue Screen of Death. Frequent error codes associated with vgk.sys include SYSTEM_SERVICE_EXCEPTION and KMODE_EXCEPTION_NOT_HANDLED. These crashes are typically caused by: Reddit·r/ValorantTechSupporthttps://www.reddit.com
The vgk.sys driver is designed to provide a highly secure environment for competitive gaming. By running at the kernel level, it can:
Prevent Cheat Injection: It blocks unauthorized software from modifying the game's memory or intercepting system calls.
System Integrity Checks: It verifies that the operating system has not been tampered with to bypass security measures.
Constant Monitoring: Unlike traditional anti-cheats that only run when the game is open, Vanguard's driver starts at boot to ensure no "rootkit" style cheats are loaded before the anti-cheat itself. 2. Technical Requirements
To run vgk.sys on modern systems, especially Windows 11, several hardware-level security features must be active:
TPM 2.0: A Trusted Platform Module is mandatory for Valorant on Windows 11 to ensure hardware-backed security. Fix 6: Completely Remove the Vgk Driver (Stop
Secure Boot: This must be enabled in the BIOS/UEFI to prevent unsigned or malicious drivers from loading. Some users have reported that certain BIOS updates (like version F.35 on OMEN desktops) have caused conflicts where Secure Boot rejects the vgk.sys driver despite it being signed.
Memory Integrity (VBS/HVCI): Windows Virtualization-based Security must often be configured correctly to allow kernel-level drivers to operate without triggering incompatibility warnings. 3. Common Issues and Troubleshooting
Because it operates so deeply within the system, vgk.sys is frequently cited in Blue Screen of Death (BSOD) errors or system instability.
BSOD Errors: Often caused by conflicts with outdated drivers (such as Intel 13th Gen CPU microcode) or other anti-cheat software.
Incompatibility with Security Software: Some users find that Windows "Kernel-mode Hardware-enforced Stack Protection" flags the driver as incompatible.
"Vanguard Not Initialized": This often stems from the driver failing to start due to BIOS settings or corrupted installation files. A common fix involves renaming the driver file to vgk.txt, uninstalling the game, deleting the remaining Vanguard folder, and performing a clean reinstall. 4. Privacy and Security Concerns
The driver's "always-on" nature and Ring 0 access have sparked significant debate. While Riot Games maintains that the driver does not collect personal data or transmit sensitive information, security experts note that any kernel-level driver represents a potential "attack surface" if the driver itself were ever compromised.
Are you experiencing a specific error code or Blue Screen related to vgk.sys that you need help fixing?
If you no longer play Riot Games, you can uninstall the driver entirely.
Alternatively, run this in Command Prompt as Admin:
sc stop vgc
sc delete vgc
del C:\Windows\System32\drivers\vgk.sys
Warning: Do not delete the driver while Riot Games are installed—the game will fail to launch or force a reinstall.
Corrupted system files can break the Vgk Driver's ability to load.
sfc /scannowDISM /Online /Cleanup-Image /RestoreHealthVulnerable Code (pseudo):
case IOCTL_KILL_PROCESS:
pid = *(HANDLE*)user_buffer;
ZwTerminateProcess(pid, 0);
Patched Code:
case IOCTL_KILL_PROCESS:
if (!IsCallerTrusted(PsGetCurrentProcessId()))
return STATUS_ACCESS_DENIED;
pid = *(HANDLE*)user_buffer;
if (!IsPidAllowed(pid)) // Never kill critical system processes
return STATUS_INVALID_PARAMETER;
ZwTerminateProcess(pid, 0);
/dev/vgk device node to user-space VMM components.