McAfee Security Scan Plus checks your computer for antivirus software, firewall protection, web protection, and other threats.
Since our test machine is clean for obvious reasons, McAfee Security Scan Plus found no real errors but claimed to have found one supposed "Online Threat." It was pretty apparent to me that this was most likely an advertisement for McAfee antivirus. It was. As you can see in our second screenshot below, there are three different locations in the small window linking to McAfee Antivirus, and if you count each category of what it scans for, that makes it seven links total. A little over the top for our taste.
McAfee Security Scan Plus requires installation, something we're not a fan of in any scanning and removal software not counting your primary, frequently used programs like Malwarebytes. No one needs the hassle of installing multiple programs when trying to remove a difficult infection.
That said, McAfee removal tools have proven to be consistent and reliable over the years, so this is another one of those tools that techs might want on their thumb drives for that one time you need it.