I have just completed a factory restore on a Compaq Presario PC. The factory restore states that it is Windows XP home edition with service Pack 2. Problem now is I cannot download any Windows updates. A web search revealed that in order to download Windows updates I need service Pack 3 installed. Trouble is I am going round in circles trying to find service Pack 3. Is it Windows XP Service Pack 3 Network Installation Package for IT Professionals and Developers or is there another version?