A blue screen naming vgk.sys points to Vanguard's kernel driver conflicting with another driver or tool. Clearing that conflict resolves it. Jump to your situation below or work through the methods in order.
A blue screen that names vgk.sys as the failing module means Riot Vanguard's kernel-level driver crashed, and it almost always reflects a conflict with another driver or low-level tool rather than Vanguard being broken by itself. The common triggers are outdated graphics or chipset drivers, overclocking utilities (MSI Afterburner, Intel XTU), and overlay or capture drivers that hook the system. The fix is to remove the conflict: update the graphics and chipset drivers, fully close overclocking and overlay software (not just minimise it), and if the crashes continue, reinstall Vanguard to replace its driver cleanly. A cold restart after driver changes lets the kernel re-read everything. Because vgk.sys sits at the kernel level, another misbehaving low-level component is what tips it into a bugcheck, so clearing that stops the blue screens.
Vanguard installs a kernel driver, vgk.sys, so it can watch the system for cheats. A blue screen naming it means that driver hit a fatal error, which at the kernel level is usually another driver or low-level tool interfering rather than Vanguard failing on its own.
The usual offenders are stale graphics or chipset drivers and overclocking or overlay tools. Updating drivers, closing those tools, and reinstalling Vanguard removes the conflict, and a cold restart lets the kernel load the corrected set of drivers cleanly.
“A vgk.sys blue screen looks scary because it is Vanguard's kernel driver, but it is nearly always a conflict, not Vanguard imploding. I update the graphics and chipset drivers first, then fully close anything that pokes the kernel, MSI Afterburner, Intel XTU, capture and overlay tools, actually close them, not tuck them in the tray. Then a cold boot. If it still bugchecks, I reinstall Vanguard so its driver is replaced clean. That sequence clears the vast majority.”
A vgk.sys blue screen is Vanguard's kernel driver crashing from a conflict. Update graphics and chipset drivers, fully close overclocking and overlay tools, disable conflicting antivirus or second anti-cheats, and reinstall Vanguard if it persists. Cold restart after driver changes.
If the blue screen continues after driver updates and a Vanguard reinstall, read the minidump to see which module sits alongside vgk.sys at the fault address, since that names the specific conflicting driver to update or remove. You can also submit your error to us for a tailored fix.
