I'm a longtime and active user of windows 2000 - I use two pcs, one for games and films, and the other for more mundane stuff like internet, printing etc. Yesterday, I was offered a secondhand copy of windows xp and given that xp is a little more flexible than W2K, I told the buyer that I might be interested but need to clear one or two things up- 1) is it true that xp HAS to be registered? 2) can I install the same os on my two computers? 3) only one of my computers is hooked up to the net as I don't want both computers filled to the hilt with numerous drivers and internet related software so the games computer wont be able to access the web - would I have a problem with this? 4) I've been told that microsofts policy is one pc, one xp operating system for life - this being the case, should I actually be buying secondhand?