Multikey.sys Windows 11

Open Command Prompt as Administrator and run:

driverquery /v | findstr multikey.sys

This shows the driver’s Module Name, Display Name, Driver Type, and Start Mode. If Start Mode is Boot or System, the driver loads early and is critical to investigate. multikey.sys windows 11

If you go to Windows Security > Device Security > Core Isolation and try to turn on Memory Integrity, it will fail to activate. The error log will indicate that multikey.sys is incompatible with HVCI. Open Command Prompt as Administrator and run: driverquery

multikey.sys is a kernel-mode driver component associated with input device handling on Windows systems. Historically, files with names like multikey.sys have appeared as part of keyboard/multimedia input stacks, third‑party keyboard utilities, or drivers for devices that expose multiple keys or input channels (e.g., multimedia keyboards, specialized macro/keypad devices). As a kernel driver, it runs at a privileged layer (ring 0) with direct interaction with the OS’s input stack and hardware abstraction layers. This shows the driver’s Module Name , Display

Open Command Prompt as Administrator in Safe Mode and run:

sc delete multikey

This removes the driver from the Windows Service Control Manager.