A virtual USB MultiKey driver acts as an emulator for physical USB hardware dongles. Software developers often use these to protect high-value applications from unauthorized copying. In a virtual environment or on modern workstations, these drivers allow the operating system to "see" a connected USB security key even if no physical device is plugged in.
Installing these on modern Windows versions often requires bypassing security features:
Users often encounter issues on modern 64-bit Windows systems because this driver is frequently unsigned, causing Windows to block it for security reasons (Error Codes -3, 7, 39, or 52). The Standard Fix Process: Disable Signature Enforcement
Quick steps to get it working (Windows 64-bit)
The MultiKey driver works via .reg (registry) files that contain your dongle's data.