if its a laptop its debatable whether its usefull so you could probably disable it there too.
However in the eventuallity you dont want to do that you could try this reg file:
Windows Registry Editor Version 5.00
import that and reboot, hibernate and wake up and see if its still missing. if it is the only other work around I can think of would be to hit ctrl+shift+esc to get task manager up, kill all instances of explorer.exe in the process list, then file > new task and type explorer.exe in that box.
and wait for someone else to come up with a solution
Ep, glad to see you come back and tidy up...did want to ask a one day favor, I want to enhance my resume , was hoping you could make me administrator for a day, if so, take me right off since I won't be here to do anything, and don't know the slightest about the board, but it would be nice putting "served administrator osnn", if can do, THANKS