I get Norton Internet free with Comcast. I have been getting Trojan Powerlik activity, Trojan.Ad click activity, and also High Memory Usage. Its making my computer run slow, and I constantly have to sign in on everything. It also tells me that my page has to be shut down. Yesterday I ran a complete scan on my computer and I also ran the Norton Power Eraser and it still happens. What do I have to do next to get rid of this virus ? Thanks for any help. Carol