MSE is not linked to XP so will keep working but it is not very good and latest reviews don't rate it all. I would uninstall MSE and install Avast or AVG (free versions).
Upgrade depends on the licence which is normally for one pc only.
OnePlus 5 review
Best of the Grad Shows 2017: UAL Central Saint Martins
MacBook Pro 15-inch (2017) review
Comment connecter un MacBook à une TV ?