And, once again, always remember that both unmanaged policies and true preferences within Group Policy are not self-regulating, but rather "sticky" inside the registry. If a GPO applies settings to a machine and an administrator then tweaks settings inside GPMC so that the GPO no longer applies to that same machine, anything that is a true managed policy setting will be automatically removed from the workstation, but anything that is a sticky preference will hang around until changed by the user, or until flipped back via a new GPO.

Both of these data points apply whether we are talking about Group Policy Policies that are unmanaged, or if we are talking about actual Group Policy Preferences. The big difference between unmanaged policies and Group Policy Preferences is which section of the GPME they reside in. Unmanaged policies are under the Policy section, inside Administrative Templates. Actual GP Preferences, on the other hand, have their own folder inside the Editor and are lumped together there. Why the separation? Because while you can't really modify or add to the real preferences folder, that is exactly the point of Administrative Templates. I don't believe I have mentioned it yet, but you have the ability to create your own policy settings.