DeviceLock settings configured via DeviceLock Management Console or applied via DeviceLock Enterprise Manager are restored to default at each reboot of a client computer. Connection to the client computer with DeviceLock Management Console ends up displaying "This machine is configured to use Group Policy settings" warning.
The issue indicates that DeviceLock Service installed on the 'problem' computer is configured to work in Group Policy mode. The local settings get overridden by the ones from Group Policy Object.
1. Disable "Use Group Policy" option in "Service Options" on the client
2. Configure/load DeviceLock settings into the Group Policy Object applying to the client computer.