If your control panel applets are ever missing while you're in Admistrator mode, the FIRST thing to do is ensure that the Software Licensing Service (SLS) is running properly.
1) Launch services.msc from a run command
2) Find the SLUNotify service & stop it
3) Find the Software Licensing service & stop it (it may say that ReadyBoost needs that service to run; stop it anyway)
4) Restart both services, starting with Software Licensing