Enabling ,disabled Task Mgr and registry

Error: Task Manager has been disabled by your administrator
Click Start, Run and type this command exactly as given below: (better - Copy and paste)
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f

Error: Registry has been disabled by your administrator
Go to Run(CTRL + R) and type
"REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f".