: Modern versions are specifically designed to bypass Windows' mandatory driver signing requirements, often requiring the OS to run in "Test Mode" or with integrity checks disabled. Relation to SolidCAM

Users frequently encounter errors like "Virtual USB MultiKey drivers cannot be loaded" (error codes -3, 7, or 39). Typical resolution steps include: Disabling Driver Signature Enforcement

Run remove.cmd or uninstall.cmd from the MultiKey folder as an Administrator.