What do you mean by "Everything seems fine?" What is everything? Do you mean that the install completed successfully but the system will not boot? Is this a Genuine Copy of XP SP3 or a Boot-leger? Did you do a Full Format or a Quick Format? I would love to try and help you but I need many more facts about it all. Do the Bios / Setup recognize the full capacity of the HDD? Etc... Ad On Infinitum!