I have Norton 360 Deluxe, using Windows 10. I have never, to my my knowledge, installed McAfee.
I kept getting unwanted pop ups' including McAfee, in Google Chrome so I uninstalled Google Chrome. I am now getting similar messages in Outlook. The latest one says: "Mcafee 2022 Alert. WARNING! System have detected (13) viruses."
I am also other getting spam or junk mail, including similar McAfee messages and other unwanted rubbish. They were going to my bulk mail folder, from where I blocked each sender, then permanently deleted them. They are now coming into my inbox. I have run a full Norton scan and it says everything is clear. I have run Norton Power Eraser. I have uninstalled Google Chrome. I have now run out of ideas.