Its most common legitimate use is with in virtual environments (e.g., connecting a USB device from a Windows host to a Windows guest in QEMU, or using it with specialized forensic/development tools).
1. Executive Summary The Usbdk (USB DK) driver is a legitimate, open-source kernel-mode driver for Windows (x64). It is primarily developed by the UsbDk Team (often associated with the QEMU/VirtualBox open-source ecosystems) to provide low-level, high-performance access to USB devices from user-mode applications. It is not a native Microsoft driver. Usbdk Driver -x64 Download