Task Manger Disabled

Task Manger Disabled
Using Group Policy Editor - for Windows XP Professional to Enable Task Manager.
1 .Click Start, Run, type gpedit.msc and click OK.
2 .Navigate to this branch-
User Configuration / Administrative Templates / System / Ctrl+Alt+Delete Options / Remove Task Manager
* Double-click the Remove Task Manager option.
* Set the policy to Not Configured.
Enable RegEdit [It is not tested]
REGEDIT4
[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersio
n\Policies\System]
"DisableRegistryTools"=dword:00000000
Save the text file as any name u with extension .reg
example:- "enable.reg"