On my computer I have macfee and everything is working fine except the real time scanning sometimes does not turn on. Do I have a virus, because that is the only thing that doesn't work right?
It could imply that or also that I assume you updated 11.6 to 12.1 version automatically. If you did that I would recommend uninstalling and reinstalling from your account. I have seen this and got it myself as well.
reboot and run
and reinstall from your account