I think that there may be a virus or something on my computer. For example when a website, whenever I scroll down certain images from what I just scrolled from will appear somewhere on the screen or what ever the background color is it will for a box like shape and only will disappear if I either refresh the screen or hover over a near by link. Can you guys help me?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic