Support may need to remove the Pcs from your account. As we mods do not have account access the techs need to do this. There are several ways to go best they look at it. So you have two licences and your other half to be has 1 of her own on another account?
My choice would be kill your account and create a new 1 and move licences to that account via the subscription repair tool.( that for your info) You cannot do that yourself sorry.
Always best to remove via windows Programs and features and then run MCPR then reformat. that way old Pc names are removed.
Both licenses are under my account, that's why I thought it was so weird when I reinstalled McAfee on her computer and she had no issues.
Thanks for the info, do you have a good number/extension to reach support?