if u have loads of services running at background and don't know which one is needed or which one can be terminated,then get this software in which u can stop/pause/resume all the services running in XP.This one is called
Service Controller XP,has a good GUI and gives info/suggestions about the services and it's importance.
Try this and give ur feedback here.
Download at:-
http://www.freeware-alternative.uni....roller-xp.html