An incorrect installation of McAfee program can cause the various issues to its user in future. Thus, the user should always consult a technician before installing the program. A professional know what preparations should be done before installing this software and they also check for system requirement for the same.
Similarly, if you are facing an issue in removing this antivirus program from your PC then you can use McAfee removal tool for the same. The other way out of removing this antivirus is through system control Panel. But still, I would recommend that user should go for removal tool as that is trusted as well as error free.