Task Manager has been disabled by your administrator

"Task Manager has been disabled by your administrator" error

When you pres Ctrl+Alt+Del to to open task manager then you may get the following error-"Task Manager has been disabled by your administrator" .
This happens if there is restriction in the registry-
DisableTaskMgr value becomes one(1) instead of zero(0)
In XP Professional it may be blocked via the "Local Group Policy" or "Domain Group Policy".

SOLUTION:-

XP Home Edition:-

1]Start>Run>Regedit>OK

2]Now navigate to the following location:-
Software\Microsoft\Windows\CurrentVersion\Policies\System
Double click on DisableTaskMgr. If it is not present then Create a new DWORD valued named "DisableTaskMgr"
0 = default, 1 = disable Task Manager. Set the value data zero.

3]Restart computer.

XP Professional:-

1]Start>Run>gpedit.msc>ok

2]Double click on Administrative Templates under the User Configuration.

3] Now double click on System. Select Ctrl+Alt+Del options. Double click on it.

4]Select Remove Task Manager. Right click on it and select Properties. If this setting is enabled and users try to start Task Manager, a message appears explaining that a policy prevents the action. So by disabling the policy, you are enabling the Task Manager.( (Click Setting>Select Disabled radio button>Apply/OK)