Window XP: Enable / Disable Task Manager in Windows XP.

Issue:
how to enable / Disable Task Manager in Windows XP.

Cause: There is due to registry hack which enable or disable Windows TaskManager.

Solution 1:
Go to “Start->Run” and type “regedit“, press “OK“. [Registry Editor will open.]
Go to
HKEY_CURRENT_USER->Software->Microsoft->Windows->CurrentVersion->Policies->System
Check for name “DisableTaskMgr” of type “REG_DWORD” in the right pane of registry editor. 
if not present then right click on blank space and select “New->DWORD value“
Give the name to newly created DWORD to “DisableTaskMgr“.
Double click on “DisableTaskMgr” and check the value if it is “0″ [zero] or not, means Enable.
If not then make it “0” [zero] to enable Task Manager.
[Note:]
Value: 1 = Enable this key, that is DISABLE TaskManager.
Value: 0 = Disable this key, that is Don’t Disable, Enable TaskManager.

Finally close all window and restart the system.

Solution 2:
Go to “Start->Run“, type “gpedit.msc” and click “OK“. [It will open Group Policy window.]
In the Group Policy settings window Select
User Configuration->Administrative Templates->System->Ctrl+Alt+Delete options
Double click on “Remove Task Manager“
Select “Diabled“.
Click “OK“.
Finally close all window and restart the system.
[Note:]
Since the policy is “Remove Task Manager“, so by Disabling the policy, actually you are Enabling the Task Manager.