I'm using a Dell laptop with Windows XP which is unbelievably slow. The CPU usage is fluctuating every second between 10% - 100%. This starts as soon as I boot the computer up. Under task manager there is nothing suspicious. The process that seems to be responsible is 'System' which I believe encompasses a lot of things? I've ran a virus check which found nothing. Any suggestions as to other things I could try to solve this would be very welcome. I basically can't use the thing at the moment.