Usually system administrators need to keep the systems with their control. Either it is for data safety or for system safety. In such a way here it is an option for disabling the task manager by Registry and Group Policy Editor.
First we look at the Registry Editor. To disable the Task Manager follow the following steps carefully.

1. Start Regedit Through Run Command
2. Click Start
3. Select Run Command
4. Type Regedit
5. Click OK
Hive: HKEY_CURRENT_USER
Key: Software\Microsoft\Windows\CurrentVersion\Policies\System
Name: DisableTaskMgr
Type: REG_DWORD
Value: 1=Enable this key, that is DISABLE TaskManager
Value: 0=Disable this key, that is Don’t Disable, Enable TaskManager
Always it is very danger to edit and restrict the users with Registry Editor. As the improvement in Microsoft goes up high some enhanced facilities are making the Operating Systems user friendly. In such a way Windows 2000 and Windows XP are having the same facilities such as Group Policy Editor. By this

editor we can easily restrict the user from accessing the files, folders and drive etc.., If we would have to rearrange the group policy we can not do it unless we re-authenticate the domain.
Editing by the Group Policy Editor.
1. Click Start
2. Click Run
3. Enter gpedit.msc in the Open box and click OK
4. In the Group Policy settings window
5. Select User Configuration
6. Select Administrative Templates
7. Select System
8. Select Ctrl+Alt+Delete options
9. Select Remove Task Manager
10. Double-click the Remove Task Manager option
Do the same as mentioned above to enable the task manager.