Open Mcafee security centre and go to Web and email protection/Firewall and Internet connections for programs and see if the exe is allowed or blocked.
As you said maybe Mcafee is not the issue but check above first. No popup?
Have you checked windows event viewer if and error is mentioned?
Hello. Although I don't know much about McAfee, I can help with any problems related to FastAccess (the face recognition software). I quick test just to rule out any components of FastAccess having been corrupted or damaged would be to do a de-install and re-install of FastAccess itself. If you need help obtaining a replacement installer, let me know here or write to us directly at email@example.com