...When it starts up again....get a copy of MalwareBytes free program and it will get the bugs out.
I used to pay McAfee $40 bucks a year and got a couple of viruses during the 3 years, including an early ransomeware bug, early enough that I had never heard of it. I managed to get ride of the ransomware by my own efforts without cleaning the HD or restoring but it was tedious. I don’t think I could do that with the newer forms. I finally dumped McAfee and went to Malwarebytes free and have not had a virus since. After a couple years of Mbytes free I saw an offer to get paid-for-life Mbytes for $9.69 and got it. It tells me once a week or so that my Mbytes is up to date and functioning. I have become a defacto unpaid salesman for Mbytes since.