For the past few weeks I had a free trial of McAfee antivirus installed on my computer. Once the trial ended, I got another antivirus program, but McAfee refused to give up, still disrupting my computing every day.
What are you supposed to do, then, when an antivirus acts like a virus? A few years ago when I happened to have two antivirus programs installed, one tried to take the other down. I suppose they're territorial.