When I scroll up or down in any window, it doesn't scroll normally. It looks as though it's re-loading the page every time I scroll up or down, it's kind of hard to explain, if anyone knows what I'm talking about, please reaply.
Does this happen only in IE? If so, go to Tools > Internet Options... and go to the Advanced tab. Scroll to the "Use Smooth Scrolling" option, and make sure it's checked.