Frank you should get rid of SEP 11. It's at EOL.
If you are in the consumer only user space, you may also want to check with your ISP. Comcast, AT&T, Verizon all provide a free consumer AV/Security product that is above and beyond the basings of Defender. You can get by if you safely browse, some consider it bloat, but I have confidence in providing it for general users who want email and web protection. Norton, provided by Comcast, also has system tuners. I've set up schedules for many family members and have not had as many family service calls.