If you start/control panel/user accounts/a new account you can set up accounts for you parents. I am a little puzzled about what you have actually done so far. When you installed the operating system again did you go for a repair or a new install? During a new install of XP you would have been given the opportunity to set up user accounts. If you manage to set up new user accounts then you can simply drag and drop the files and folders from where they are to the new files and folders. Why or what has gone wriong I have no idea but this should help you get back to normality. Other posters may offer you alternative guidance or comments which may help you further.