Hi im running windows xp and recently and right now actually my pcs been using 100% of the cpu making my pc really slow. It was explorer.exe doing it and i dont know why. Also i have updated spybot and searched for spyware, deleted it all but the porblem is still there. Also does anyone know what the PF Usage is in task manager. It says mine is using 300 MB of it. When usually it is about 174 or so.