*sigh* First of all, it's hard to really fix anything with a migraine, but I'm stubborn, and the possibility of any type of security risks has me going. I have a macBook Pro, bought in Feb. I'm using At&t/Yahoo! Highspeed internet connection (DSL/WIRELESS/ETHERNET) My laptop was fine yesterday. But after frantically looking around, I found out that "Block-pop-up windows" had been unchecked...oh! just discovered that it unchecked itself somehow... Okay, every time I try to get onto either Safari or Firefox and go to any site, I keep getting this fishy Comcast site. On it it says welcome to comcast, yada-yada, this installation process will take a few minutes...there's two bottons to click, one says 'I am a customer", the other says "I am a technician". It looks legit, but I never wanted comcast in the first place nor did I download anything from Comcast. Why would I? I already have net connection. It won't even let me log-in to my messenger, nor iTunes radio... I don't know what else to do. Even when I try to get on Yahoo, it takes me directly to this site. Something just doesn't seem right, but to me it's apparent that something was downloaded onto my laptop to get me to give my personal info. What do I do to make this go away?