How to Disable Task Manager

How to Disable Task Manager, Task manager is a tool that has the default windows so many functions, one of which is shut down the software or program that is running or shut down the software that freezes (hangs), task manager is sebenarny so many functions, but for a cafe like this should be the task manager is off course why?
Lots of users are intelligent because of his intelligence could cheat the internet cafe by turning off some software such as billing software that causes chaotic timer and fees charged to customers, are still much more to be done with this task manager which can be detrimental to the cafe, therefore should be function of task manager is disabled only, steps to disable the task manager is as follows:
Please open the registry editor by clicking Run> regedit, then please find the following registry key: HKEY_CURRENT_USER Software Microsoft Windows CurrentVersion Policies.
After that create a key again by clicking the right key and Policies, and then name the key to the System. Well, would we now exist in the directory HKEY_CURRENT_USER Software Microsoft Windows CurrentVersion Policies System.

after that, create a DWORD Value, type a name DisableTaskMgr, then double click the Value and enter the numbers with the numbers 1

Restart your PC or logout and press ctrl + alt + del, then it will come out a message that the admin banned the use of Task Manager.

So easy is not it good luck and hopefully useful