What do you recommend as the best MS Anti-virus Security Protection for my MS Outlook, etc.?

Hi. I'm Brian and I'll try to help.

In my opinion, Defender, included with Windows, is the best. Microsoft knows Windows better than anyone and since a true security suite must operate, at least in part, in the operating system kernel, Defender is most likely to not get anything wrong when doing so. Note that these are user-to-user forums. Most of us don't work for Microsoft. No one here can call you or email you.