Enable task Manager

This is one popular funtion when some application hang...then you must press CTRL+ALT+DELETE
to end that task, but if your system say "Task Manager is disabled by your administrator"
this is the step to solve it...
To enable Task Manager:

1. Run > gpedit.msc (Press enter). Group policy editor will appear.
2. User configuration > Administrative Templates > System > "Ctrl+Alt+Del Options"
3. Double click on "Remove Task Manager".
4. Disable this option (Yes, disable. If you enable this option Task Manager will be disabled)