As of 2025, is essentially dead on up-to-date Windows 11 systems. Users report BSODs (Bug Check 0x109: CRITICAL_STRUCTURE_CORRUPTION) immediately after installation. The only way to run it is on an air-gapped Windows 10 (version 1809 or older) with no internet—a scenario impractical for most.
Enforcing driver signatures prevents unsigned kernel-mode drivers from executing. To bypass this for testing environments, administrators often shift Windows into or disable Driver Signature Enforcement. This is achieved via the command prompt: bcdedit /set testsigning on 2. Registry Configuration
Deploying MultiKey 18.1.1 on modern 64-bit systems requires modifying core operating system security behaviors.
If you are evaluating the software for a business purchase:
Fix: Disable Memory Integrity in Windows Security under Device Security > Core Isolation , as HVCI explicitly prevents unsigned or vulnerable drivers from executing in the kernel pool. Security, Stability, and Legal Considerations