Dell Precision M2400 (Mid 2008) - Manual (Page 129)

The Power Policy tab has configuration options to select the sleep states for Intel AMT as well as an Idle Timeout setting.
It is recommended that Idle timeout is always set to 0 for optimal performance.
The setting for the Power Policy tab can potentially impact a computer's ability to remain E-Star 4.0 compliant.
Select Step 5. Generate Security Keys.