I have what I believe to be a legit Windows XP Disc+serial. Having done activation via Internet I got the Thank you for Activating Windows , Ok button. Ok button clicked and I'm back to Logon Screen (Ctrl+Alt+Delete). One more time and Internet activation no longer worked. So I called Microsoft toll free and tried activating via telephone . thank you for activating Windows, Click OK. ....and I'm back to logon screen. What's up with that?