Maybe there is a way to keepwindows and permanently remove MSN messenger, MS Office and all that. But it might all come back as soon as they release the next service pack. There are bound to be other problematic apps in the future that you have a hard time installing. Win2K is still the best windows, but comeon, its already 3 years old. M$ doesn't support it anymore, and its probably only a matter of time before it really becomes obsolete. This may take a year or two, who knows, but eventually you have to move to something else, and trust that you're going to have even less control over your comp when you do, if you stay with M$, cause successive versions of windows give users less and less control.
Point is, your going to get to the point to where crap is on your machine that you can't remove. SO you may as well just leave MSN messenger and Office 2K on there and get used to unwanted software being on your machine, or ditch M$ shit and get an OS that you really have control over, there are plenty of them that work VERY well, and can be downloaded free of charge.
V