43b7af74_vices_List___Overclockers_Club__Notes
[Service Name] Task Scheduler [Recommended Setting] Disable [Notes] 
Disable this, it uses resources.. If you have some Anti-virus software like Norton, it may depend on this service to run auto virus scans, every week or something.. So the choice is yours.
Windows XP Services Removal Guide » Page 2 - Windows Services List - Overclockers Club
Notes