Just noticed this when I reinstalled WinXP after formatiing my HDD... (wasnt like this when I had winxp last time). Whenever I press ALT-TAB to switch between windows, a medium sized box appears showing the different open widow icons, and then to the left a screen preview... Neat I guess, but it really is slowing things down waiting for the preview of the screen to show up... How do I disable this? PS... I noticed anothing thing... I have a 3 button mouse, where I use the middle button to scroll up and down. Doing this now, I noticed that it goes really slowly now. Any ideas what to turn off? Im pretty sure it's one of the animation effects.