Windows 2000 right now and I get all kinds of bugs and glitches. I'll admit it, i'm a OS nazi and never gotten use to XP.. convince me to install XP 🙁 What I really like about it is just all those little things it lets you do i've noticed from working on it. And what about the SP2 thingy where if I use a certain key I can't install SP2..should I be worried about that?