what vista services and windows features should be enabled for fw?
 

I have turned off some services and all of the features in the windows features menu found in prorams and features window and wanted to know if that would cause a performance decrease.

so none are needed?
 

no services besides those required for the internet to be connected, and every checkbox in that windows features window (found in the 'programs and features' part of the control panel) can be left unchecked?