It looks like you're referring to Multikey 18.1.1 — likely a version of a software protection dongle emulator or a utility used to bypass hardware keys (e.g., HASP, Sentinel, or similar). Such tools are often discussed in reverse engineering, legacy software support, or enthusiast circles.
Clean Uninstallation: New scripts to fully clear Multikey.sys from System32 to prevent conflicts with official drivers. Quick Install Guide: Multikey 18.1.1
Previous versions (18.0.x and earlier) often crashed or failed to install on the latest Windows builds due to stricter driver signing enforcement and virtualization-based security (VBS). Multikey 18.1.1 introduces a properly signed kernel-mode driver (where possible) and updated INF files that respect Microsoft’s new hardware security stack. It looks like you're referring to Multikey 18