Do you have trouble with a user account?
Your desktop icons should be in the old user in the path:
C:\Documents and settings\Your_user_name\Desktop.
Copy them to the desktop of the current user.
As for the start menu, are you talking about what shortcuts should have or about the look of it? Maybe some programs where installed for only one user, but go to Program files and see if you can find your programs, then right click taskbar and select proprieties and go to start menu tab( select the view you want) then click customize. You can remove or add programs and shortcuts, or whatever. Or you can go to advance and copy what you want right in the start menu folder.