To install and register the (the SDK for ZKTeco biometric devices) on a 64-bit Windows system, you must place the 64-bit version in the correct system folder and use the elevated Command Prompt to register it. 1. Download the Correct SDK
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If you continue to experience issues, consult your attendance software vendor for the exact SDK version required, and ensure you are not mixing 32-bit and 64-bit dependencies at the application level. zkemkeeper.dll install 64 bit