I am running XP pro on a ACER 270 laptop. Has been great, but I now am showing 100% CPU usage when I clt, alt del although nothing other than the start screen is open. I have run Pest control and it shows no problem. I have Mcafee viruscsn V4.5.1 SP1 installed and running and have not been to any dodgy sites. Needless to say the machine is now running v slowly. Specifically outlook which takes an age to load. I cannot identify any rouge items in proccesses.