The Windows Hardware Lab Kit (Windows HLK) is a test framework used to test hardware devices for Windows 10. To qualify for the Windows Hardware Compatibility Program, your product must pass certain tests using the Windows HLK. CryptoServer HSM is used to secure the signing keys so that your signing keys never access by any unauthorized entity. Microsoft HLK uses RSA keys for signing the packages. Microsoft HLK is a 32 bit application so you have to use the 32 bit Utimaco CryptoServer CSP 32 bit.