do u get an error message? Can you right click on it and choose Properties? If you can, where the shortcut going to? Go there and see if the program is listed there. If it is, your second option is to remove notepad in add/remove programs (windows programs) and put it back and see if that works (it may require u to put the XP cd in your cdrom drive).
Update: When I ran the program notepad.exe on my startup menu (click on run) to see if the program was in fact on my computer, it booted right up. Once I determined that the program was on my computer and functioning properly, I simply ran a Google DESKTOP search of notepad.exe to find the correct target path and then simply replaced the bogus target path info with the correct info. Everything now works perfect.
I was going to suggest the run menu,but it works,so open Windows folder
find Notepad copy and create a shortcut in the start menu anywhere.
Do you know where you find your Start Menu folders ?
Get rid of the one you have.and paste this one.