Re: Windows 7 possible bug or driver problem?
I have had that problem in Windows 7 and Vista. Even when just resizing a window it would be really choppy and laggy...especially video, resizing or moving the player. Never did figure out exactly what triggered it or fixed it. I did notice that it did not do it early on while installing Windows, but started after installing Nvidia drivers though.
I do not use Desktop Composition or Aero or whatever. No fancy shadows or animations. I do use "Show windows contents while dragging" but it also did it when that was off too. Just a stuttery outline moving around.