Problem: Missing hardware key messages in Windows


After installing the ESRI License Manager and rebooting, the system displays a message that the hardware key is missing, not plugged in, or cannot be found.


The parallel port has not been enabled. Windows allows a printer to work even though the parallel port is not enabled.

Solution or Workaround

Contact your system administrator for assistance with this procedure as it requires knowledge/experience in editing BIOS settings. You must have administrative privileges on the computer to carry out the steps. For further information on editing BIOS settings, contact the computer's manufacturer.

The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult with a qualified computer systems professional, if necessary.

Esri cannot guarantee results from incorrect modifications while following these instructions; therefore, use caution and proceed at your own risk.

1. Browse to C:\Program Files\Rainbow Technologies\Sentinel System Driver and launch SetupSysDriver.exe.
2. Click Configure Driver and verify a physical address and port type for the parallel port.

If these are not seen, the parallel port is not enabled. Continue with the steps below and enable it.
3. Uninstall the Sentinel System Driver by clicking Start > Settings > Control Panel > Add/Remove Programs.
4. Reboot the computer and enter the system BIOS.
5. Enable the parallel port.
6. Exit BIOS and reinstall Sentinel System Driver. Use the Sentinel Driver link below to download the driver.

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