Hi @hendricksondoug,
Greetings from McAfee.
If McAfee antivirus tool detects a site hosting malware, it will blacklist the site by adding it to its database of malicious websites. When you try to browse to a website that you believe is trustworthy, the McAfee Firewall function called Net Guard blocks you from accessing the site. This function uses a repository of known good and known bad domain names and IP addresses.
To know the rating of the websites and for workarounds to access sites which are blocked by Netguard, kindly follow the below McAfee article
McAfee Document ID : TS101116
For further assistance, you can reach our McAfee support
Regards,
Abhi