Solution: Task Manager has been disabled by your administrator

If you are getting error, “Task Manager has been disabled by your administrator”, when trying to launch task manager on Windows XP machine then here is a simple solution for you.
Solution: Click “Start >> Run” and type following command exactly as given below and click OK.
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f

Screenshot:
Run commend on window by devils workshop Solution : Task Manager has been disable
by your administrator

Yep. This problem is solved now!