Task Manager is a smart small utility in Windows XP that provides us information about applications and processes running in our computer. In the task manager, we can see the status of the programs that are currently running and choose to end programs that have stopped responding.
Of course it would be frustrating if the task manager was disabled for certain reason, but fortunately there’s a method to enable it back using a registry tweak. You can also choose to disable it with this method.

1. Firstly, from the Start button click ‘run’ and start Regedit.
2. Go to HKEY_CURRENT_USER\Software\Microsoft\Windows\Curre ntVersion\
3. Create a new key called “System”.
4. In System, create new DWORD value: DisableTaskMgr
5. Set the data value to 1 to enable Task Manager.
6. Set the data value to 0 to disable it.

Once you done the above, it should work right away.