There are entries in the recent history section of the security history that I'm concerned about. There are several Info entries that say that firewall rules were updated, and a couple of entries that say "you created firewall rules to manage .....". One of these refers to rules about how "DefaultPack" accesses network resources, and the other refers to rules about how "Consent UI for administrative applications" accesses network resources. I didn't create any firewall rules; I wouldn't even know how to do that.
Today's entries are the only instances of reports on firewall updates that I can find in all the security history that I looked at. I'm concerned that I may have some sort of virus or malware that is altering my firewall rules, but neither a Norton scan nor a Malwarebytes scan finds any problems.