you must either have deleted the program/s in question using add remove programs sometimes leaves empty shortcuts here after removing the program. right click and delete the empty ones.
if you still have the programs on your computer right click the 'start' button, click 'explore' and browse to the location its saved in then right click the executable select 'create shortcut' then drag this and hold it over the start button. the start menu will show after a second or two. drag it over 'all programs' to place it the menu.