XP, Vista, and similar operating systems.

For now, I'm using Windows XP, but I plan to switch to Vista with my next upgrade (in the fall or winter). The main reason is Halo 2, and I've also seen enough of the operating system – there's nothing particularly interesting about it, except for the ability to scroll through windows. Even Linux had the cube – that was a cool feature. A split desktop, and you could rotate the cube however you wanted. However, I'm disappointed by Microsoft's approach to the operating system; there are few innovations, and it weighs 15 GB and has significant system requirements. Nevertheless, they've already started working on a new operating system and are once again promising to push the boundaries to unprecedented levels. DirectX 10 is good, but again, it requires an upgrade. I hope there isn't too much off-topic discussion; I'm wrapping up now.