Task Manager has been disabled by the Admin Error

Error:
I recently got a virus that turned off my task manager and i have been unable to turn it back on. When i hit ctrl+alt+delete i get a message that says "the task manager has been disabled by your admin"

Solution:
Copy and paste this into the run box,it`s another way of achieving the above.That doesn`t mean to say that it will fix the problem.REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f