I have had problems over the past couple of days trying to use the internet. A page jist appears and fills the whole screen and asks you to enter an adult site, if you click exit it goes onto megashopping portal. I cannot get anything done as I have to start from the beginning all the time. It took me 3 tries to get this far on pc advisor. I have run system mechanic and spy doctor. It found some infections but I can't get rid of this. I have Norton 2005 installed. I have deleted all temp internet files and defragged. i am now at a loss what to do. I hope someone can help me.