JOKEEFE received kudos from pps in 0x643 error when installing EndPoint Product (Antivirus)
"as well as the updates KB4474419 and KB4490628 are required"
That's interesting, because I have found that several of the machines giving the error, needed KB4490628. I'm not sure how that one gets missed. Once I installed that, the remote install worked as planned.
For now, I am making sure they are fully patched before trying to install ESET.