Task Manager is an extremely powerful tool in Windows, from diagnosing problems or closing stuck programs/services, even accounts that are limited have access to this program. While this might sound like a good thing it can cause huge headaches for system administrators if there are trouble makers in the company.

To Disabling Task Manager, click the Start button and go to Run and from there type gpedit.msc and press the ok button. The Group Policy Editor window should open and from there follow this path User Configuration -> Administrative Templates -> System -> Ctrl+Alt+Delete options. From there on the right hand window find the Remove Task Manager option and change its value to enabled. Now on Task Manager will be disabled.