If you go look online there is what they call the McAfee software removal tool ..I use this often when McAfee won't let me remove it from my computer..
https://service.mcafee.com/FAQDocument.aspx?id=TS101331
I've got McAfee installed on my laptop to protect it but McAfee has started to slow my computer to the point of freezes and shutting it down. I cannot delete it because it then freezes?