Ban Shutdowns : A trick to Play

In this section I teach you, how to disable the Shut Down option in
the Shut Down Dialog Box. This trick involves editing the registry,
so please make backups. Launch regedit.exe and go to :
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
\Policies\Explorer
In the right pane look for the NoClose Key. If it is not already there
then create it by right clicking in the right pane and selecting New >
String Value.(Name it NoCloseKey ) Now once you see the
NoCloseKey in the right pane, right click on it and select Modify.
Then Type 1 in the Value Data Box.
Doing the above on a Win98 system disables the Shut Down option
in the Shut Down Dialog Box. But on a Win95 machine if the value
of NoCloseKey is set to 1 then click on the Start > Shut Down
button displays the following error message:
This operation has been cancelled due to restrictions in effect on
this computer. Please contact your system administrator.
You can enable the shut down option by changing the value of
NoCloseKey to 0 or simply deleting the particular entry i.e. deleting
NoCloseKey.
Instead of performing the above difficult to remember process,
simply save the following with an extension of .reg and add it's
contents to the registry by double clicking on it.
REGEDIT4
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersio
n\Policies\Explorer]
"NoClose"="1"

Note::-This is only to know the all features of windows xp .Don't do this for illegal things