File Menu in Task Manager

[bigandfat]

I have a PC in an industrial setting. It only runs one data aquisition program and saves data to a server. I run the program directly from the registry ( Winlogon shell ).
However a hacker who likes to play games is accessing the file manager via the file menu on the task Manager. Does anyone know of a way to disable the Task manager from displaying the file menu? ( Windows NT 4 sp6, but applicable to 2000 etc.)

Thanks in advance

 

[gargouille]

Copied from elsewhere:

[[ HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System

To disable the Task Manager button, Add Value

DisableTaskMgr
0, the default, leaves it enabled.
1 disables the Task Manager button ]]

That may be more than you want, but you might experiment with other values, like
DisableMenu
and so on...under the above value as a subkey.