Here is the simple trick :
- Start >> run >> type "regedit.exe" >> hkey_current_user\software\microsoft\win dows\currentversion\policies\explorer.
- Now create a new dword value named noclose by clicking dword value. Set its value data to 1 to disable the shutdown option.
- Now it is done. Have fun.
So it is a simple trick to disable shutdown option of any windows computer.