Thank you and, YES--I am aware of how the license works. If I built another computer (so I would have TWO systems) I would have no problems with purchasing another license, except for the fact that Malwarebytes doesn't work for me. I thought that maybe it was Norton causing the problems I'm having so I uninstalled Norton. Therefore I was back to Windows firewall and NO antivirus. I left windows Defender disabled. I then reinstalled Malwarebytes PAID version (with ALL background programs disabled----as I always do). Stll no luck. After booting, within a minute or two, I get the same error as always and can not turn protection on. Considering I want to use Norton, I have uninstalled the paid version of Malwarebytes and installed the free version. It works properly and I can manually update and runs scans (if I remember). I have what is called "Chemo Fog" from my treatments and remembering things can be a task. When treatment is finished, everything should go back to normal. Perhaps in a few months I can try again but for now I am forced to stick with the free version. Thank you all for your help! Pete