Windows Embedded Standard 7 allows you to install a runtime image in two different evaluation modes. There is a 30 day mode when no PID is entered or there is an optional 180 day evaluation using a PID that you receive when you register the evaluation tools. In both cases you'll be presented with a dialog warning that an evaluation image is about to be installed:
In Image Configuration Editor (ICE) set HideEvaluationWarning in Product -> Operating System -> Foundation Core -> Windows Embedded Edition. Change the Filter view by drop down to OOBESystem. Change the HideEvaluationWarning value to 1.
