XP was definitely one of Windows' better OSs. I had two or three computers before this one that ran XP and I loved the setup. From what I've seen, though, earlier Vista was absolutely horrible. It was clunky and full of bugs, but these issues were worked out in later versions. I used to use an Acer laptop that ran Vista, but it was a piece of junk. Thinking of trying to clean the whole darn thing out and start over again with Windows 7 (I still have that laptop by the way, as a secondary). We'll see what happens.