A: Contact your original reseller. If you registered the key online, ZKTeco may have a record. Always keep a backup copy offline.
Uninstall the software, delete the folder C:\Program Files (x86)\ZKBioLock, then reinstall the latest version from ZKTeco’s website. zkbiolock register key
If the system rejects your Register Key, check for the following: Rotation:
Major version updates (e.g., V2.0 to V3.0) often require a new register key. Minor updates (V2.1.0 to V2.1.5) usually keep the existing key. Always read the release notes before updating. Recovery:
Right-click the ZKBioLock shortcut → Run as administrator. This allows the software to write its handshake key into the Windows registry.