I've looked at the cpu usage and as soon as I scroll or go for the link it ramps up to 90-100% as soon as I stop to read the page it drops back down again.
The ADSL connection and router connections seem fine and I regularly use another computer on this with no problem.
I have McAfee Security and it's all up to date and have downloaded registry patrol and MS spyware detector and spybot search and Destroy but none of this has any effect. I'd appriciate any advice