Well, I’m running several windows machines in my company with all kinds of windows versions on them and everything runs very stable. It did take some time to get there but we are talking mostly network issues. A single stand-alone PC with Windows XP will run very stable and nicely as long as you won’t install any buggy stuff on it. I am in the process of moving all my company machines to Linux but that is mainly for another reason.
Hmm, let’s see… that means you shouldn’t install anything but firefox and blender %|