Are you asking how to stop McAfee blocking the unwanted program, or how to stop the unwanted program from trying to install, or how to stop pressing the remove button?
1 pic if possible would help also
do a scan with some of the free scanners here
With getsusp add your email address to its preferences and Malwarebytes do not install the premium trial.
PS you will be reasked at the end of the install so unselect the option