McAfee Uninstall

Does anyone know why the uninstall task is not working? We have Lenovo machines and they come with the free version of McAfee. The version that has is a 5. version but the version that we have is and I can’t edit the task or the software to make it look for that version. When I go into edit the search, I take away the word Agent and it shows that it is installed on the laptop but I can’t seem to keep those changes saved so that way it affects our PC’s.